13 best home co detector

Product description

Kidde 21025778 Carbon Monoxide Alarm Battery. Made from quality materials for durability and performance. Designed for quick and simple installation.

• 2 AA battery backup
• Low battery hushes
• Event memory
• Loud 85 decibel alarm
• Low battery signal

User questions & answers

Question:	Would this device work in a 6' x 6' hunting blind with a Mr. Heater heating unit
Answer:	Not for sure but wife read that rhey can fluxiate between 0-3 with no problems mine does it also
Question:	your cob b lcm coc allarm is 15$ 6 is 99$ . why does quantity coct more
Answer:	When I used the digital gas detector to test it worked fine.
Question:	How far apart are the mounting holes
Answer:	There are two possible causes. The unit was not zeroed out upon activation or you do have a very low level of gas in your home atmosphere, with the first being my best guess. Unplug and move and re-check the reading. If this does not resolve the issue send it back for a new one. Mine has worked well for 6 months so far.
Question:	Why is the 2 pack more than 2 times the price of the single detector
Answer:	I returned these detectors. They don't have any information printed on the case - no manufacturer name, no instructions, no UL approved indicator, etc. These were made in China which is usually okay but I am not comfortable in relying on them to protect my family. I will be researching further and looking for better detectors that can be trusted.

Product features

Battery Operated Carbon Monoxide Alarm

The Kidde KN-COB-B-LPM Battery-Operated Carbon Monoxide Alarm is intended for continuous monitoring of carbon monoxide levels. The alarm features a piezoelectric horn that is rated at 85 dB at 10 ft. The alarm is battery operated for uninterrupted monitoring, even during power outages, and runs on 2 AA batteries, which are included.

Battery-operated carbon monoxide detector; no hardwiring required

Alarm will sound when dangerous levels of CO are detected

Test/reset button tests the unit for proper operation and resets the alarm

Product description

The First Alert SCO5CN Combination Smoke and Carbon Monoxide Alarm features dual sensors to detect both smoke and carbon monoxide in a single device. A photoelectric sensor detects the smoke most often produced by smoldering fires, and minimizes false alarms from cooking smoke or shower steam. Additionally, the advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel burning appliances, blocked chimneys, and generators running inside or too close to homes. A loud, 85 decibel siren alerts you to the threat; unique alarm sounds and indicator lights on its face distinguish a smoke warning from a carbon monoxide warning. This carbon monoxide and smoke detector is battery operated, so you don't need an electrician for installation. Requiring just two AA batteries and featuring an easy access battery compartment for quick changes, this smoke and carbon monoxide detector has a single button that allows you to silence a false alarm or test the unit.

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air.

The First Alert SCO5CN carbon monoxide and smoke alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The alarm uses photoelectric smoke sensing technology which is environmentally friendlier and which reduces nuisance alarms, making it ideal for cooking areas. It is also great for sensing slow smoldering fires quickly. The permanent sensors last the lifetime of the alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. A low battery signal alerts you to replace the battery and end-of-life alarm of three chirps alerts you to replace the unit. Two AA batteries are included. 5-year limited warranty. UL listed. Not available for sale in Massachusetts.--Bree Norlander

What's in the Box

One combination carbon monoxide and smoke alarm, two AA batteries, and user's manual. This does not contain voice feature.

• Keep your family safe with this battery operated smoke and carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
• Features an electrochemical carbon monoxide sensing technology as well as a photoelectric sensor that detects the larger particles of a smoldering fire
• Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection
• Battery operated unit installs quickly and easily without an electrician. Low battery signal mute, quiets low battery signal for up to 8 hours
• Simple to use, with a single test/silence button; EZ access battery drawer allows you to change battery without removing alarm from ceiling
• 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety; All first alert alarms are rigorously tested to meet UL standards
• It can ship within the US except New York
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

User questions & answers

Question:	pack is $30, 2 pack is $90. Why is a two pack so much? I thought the idea was to incentivize more product at a lower cost. This is halarious
Answer:	I no longer live in the apartment where I replaced the old smoke alarm, but you will love this one. It's so nice to flip the battery holder down and not have to remove the battery from the unit.
Question:	Advice on false alarms? Goes off every week or so. It's in our kitchen/living room, but goes off even when we are not cooking. Goes 1 min then stops
Answer:	No
Question:	I have these througout my house and rental unit. Installed them about 7 years ago and many malfunctioning. Any durability mprovments since 7 yrs ago
Answer:	The instructions that come with the unit duplicate what I have read from several Fire Department sources: you can place your unit on the ceiling, but AT LEAST 4 inches (10cm) from the wall. If you want to mount it on the wall, mount it MORE THAN 4 inches (10cm) BELOW the ceiling, but NO LOWER than12 inches (30cm) below the ceiling. It has to be high enough up the wall to "smell" the smoke, but that 4 x 4 inch (10cm x 10cm) area where the wall meets the ceiling can sometimes harbor a "dead zone" of still air where the smoke would NOT reach the detector quickly enough during a fire to warn you in time. Thus, do NOT mount your detectors too close to where the wall meets the ceiling.
Question:	How long do batteries last
Answer:	Ionization type. I actually looked at at manual to be certain.

Product description

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From the Manufacturer

Carbon Monoxide Alarm AC Powered with Battery Back up; Tamper resistant feature; Led operation; Test reset button; Alerts user to replace after 10 years of operation; Low battery hush; Event memory; UL listed.

• Tamper resist feature – Can be activated to cause unit to go into alarm if it has been unplugged or has come loose from the outlet
• 2 LED’s: Red - Illuminates when in alarm mode. Green – AC power is present, normal operation
• Test/reset button: Tests CO alarm circuit operation and allows you to immediately silence the alarm
• End of life alarm: Alerts user to replace CO alarm after 10-years of operation
• Provides peace of mind against the silent killer; Temperature range: 40˚F (4.4˚C) to 100˚F (37.8˚C)

User questions & answers

Question:	When I unplug this device the green light goes off even though the batteries are installed as a backup. Is that normal
Answer:	It's about 5 1/2 in from hinge to hinge ~ 14.5 cm. It does provide full cover. The foam is flush with my face without being uncomfortable. It however is not waterproof. The foam has air slots so it can breathe. I've used these for Chemistry lab as well as wood working, and they work great.
Question:	When I try put battery in or plug it in, the alarm goes off! Does that alarm sound stop? It's brand new
Answer:	They stay on surprisingly well! I use them for my dog grooming business. They are light weight so that works good for me. They might be a bit too light for sports. If you got hit with a ball they would probably crack and potentially cut you.
Question:	How do you turn on the "low battery hush
Answer:	Yes, it should do a good job to keep out drywall dust. However, I ended up removing it due to condensation buildup while using it
Question:	What is the location of the wall plug on the device? Will it cover the entire outlet
Answer:	yes they can fit over Rx glasses but I don't recommend because they became blurring and you will not see very well

Product features

Quality Protection

The Kidde KN-COB-DP2 plug-in carbon monoxide alarm with battery backup provides you and your family with a warning signal to protect against dangerous levels of carbon monoxide in your home. The battery backup feature provides continuous monitoring of CO levels, even during power outages when AC-only units are not providing protection. The KN-COB-DP2 alarm has a 10-year product life, providing 40% longer protection than other CO alarms.

Protection You Can Trust

Nothing is more important than making sure your family is safe and prepared for anything, and with this plug-in carbon monoxide detector from Kidde, you will always be afforded peace of mind! This CO alarm includes a battery backup to make sure it is monitoring your home at all times and uses high-tech electrochemical sensors to provide accurate carbon monoxide readings that will always keep you protected.

Plug-in to Peace of Mind

To prevent nuisance alarms from everyday activities, CO detectors are time-weighted alarms that are based on time and the concentration of CO levels. This unit will only sound an alarm if low levels of CO have been detected over a long period of time, but high or unhealthy levels of CO will immediately trigger an alarm.

Product description

Plug-In carbon monoxide alarm with battery backup.

Protect your family from the dangers of carbon monoxide (CO) exposure with the Kidde KN-COPP-3 Nighthawk Plug-In Carbon Monoxide Alarm with Battery Backup and Digital Display. The Nighthawk is an easy-to-install unit that provides reliable protection against the dangers of CO. It features a digital display that shows CO levels in parts per million allowing you to see if, how, and when levels change.

Plug-in unit with battery backup and digital display that shows CO level Level button displays the peak CO level recorded by the alarm since it was last reset Loud alarm pattern sounds when unit detects elevated CO levels Direct-plug, 6-foot power cord, and table top mounting options. Five-year limited warranty

This discreet alarm is designed to fit into any standard A/C outlet in your house. View larger.

The easy-read digital display updates every 15 seconds to indicate any abrupt changes or alarming trends in CO levels. View larger.

Advanced Technology in an Easy-to-Install, Plug-In Design

Designed for home use, the Kidde KN-COPP-3 Nighthawk is a UL-listed, A/C-powered, plug-in CO alarm that utilizes sophisticated electronic components and sensor technology to protect you and your family from the dangers of CO. It plugs directly into a standard A/C outlet and includes a 9-volt battery backup that provides continuous monitoring of CO levels--even during power outages.

About Carbon Monoxide: The Silent Killer

The leading cause of accidental poisoning deaths in North America, carbon monoxide (CO) is often referred to as the silent killer because it's odorless, tasteless, and invisible. Carbon monoxide poisoning can come about via a number of sources, including everyday items and appliances in your home or office. And because symptoms of CO poisoning mimic the flu or other common illnesses it can often go undiagnosed.

Audible Alarm Pattern Alerts you to Elevated CO Levels

When placed on every level of your home, alarms like the KN-COPP-3 Nighthawk can help protect everyone in the house from CO exposure by giving you an unmistakable signal when levels have reached an unhealthy point. If unhealthy levels are detected, the alarm will emit four quick audible beats every five seconds until either levels decrease or the reset button is pressed.

Easy-to-Read Digital Display Shows CO Levels

The KN-COPP-3 Nighthawk is unique among traditional CO alarms because of its digital display. This display clearly shows levels of CO that the unit has detected and stored-- from 30 to 999 ppm--and it updates every 15 seconds to indicate any abrupt changes or alarming trends. The display also shows the peak CO level recorded by the alarm since it was last reset or unplugged.

LED Shows Sensor Status

With the KN-COPP-3 Nighthawk, you never have to wonder if the sensor is functioning properly. A blinking dot in the lower right-hand corner of the display denotes normal operation, so you can trust that it's working. In addition, you can test alarm function by pressing the test/reset button at any time to verify that the horn and electric circuitry are operating properly.

Convenient Mounting Options

The KN-COPP-3 Nighthawk has a low-profile design that makes it suitable for any room in your home. The detector can be plugged into any standard A/C outlet; it's plug can be snapped into the back of the unit and can be rotated so the alarm remains vertical, independent of whether the electrical socket is mounted vertically or horizontally. In addition, the alarm comes with a 6-foot extension cord, so the unit can be plugged into the wall outlet and then placed on a table or shelf. For the most thorough protection, place an alarm on every level of your home.

The UL-listed Kidde KN-COPP-3 Nighthawk has a seven-year life and is backed by a five-year limited warranty.

About Kidde: A UTC Fire and Security Brand

Renowned for global leadership in fire detection and suppression, Kidde provides solutions ranging from portable fire extinguishers to advanced industrial controls such as flame detection and explosion suppression systems. Kidde is a UTC Fire and Security brand, with a history that's rich with innovations, from the patent of the Chubb Detector Lock in 1818 to the development of the world's first wireless networked smoke detectors in 2004.

What's in the Box

Kidde KN-COPP-3 Nighthawk CO Alarm, 9-volt battery, mounting hardware, and installation guide.

Keep your family safe by placing alarms and extinguishers in each area of the house, and by having a fire escape plan. Click here for a detailed image.

From the Manufacturer

The leading cause of accidental poisoning deaths in North America, Carbon Monoxide is odorless, tasteless and invisible, it's a silent killer. Kidde CO alarms include the most accurate sensing technology available, the patented Nighthawk electrochemical sensor. This alarm can be mounted three ways: plug directly into AC receptacle, mount on tabletop using 8 foot power cord, or wall-mount. The digital readout continuously displays carbon monoxide levels from 30-999 parts per million. This unit has a loud, 85-decibel alarm that sounds when CO reaches dangerous levels. One of the features of this product is peak level memory, which means this unit will recall highest level of CO present since previous reset. Install at least one CO alarm on every floor and in sleeping areas. Make sure CO alarms are at least 15 feet away from cooking or heating appliances to prevent false alarms. Replace CO alarms every 5 to 7 years to benefit from the latest technology upgrades.

• Peak level button – Displays the peak CO level recorded by the alarm since it was last reset or unplugged
• Test button functions – Tests the unit for proper operation and resets the carbon monoxide alarm
• LED operation – Blinking dot in lower right corner of display denotes normal operation
• Ten years after the initial power up, this alarm will “beep” two times every 30 seconds to indicate that it is time to replace the alarm.
• Note: This CO alarm is not battery operated. However, these alarms are equipped with 9 volt battery backup – the 9 volt battery is to supply short term back-up during a power outage.
• Power source: 120VAC. Temperature range-40˚F (4.4˚C) to 100˚F (37.8˚C). Humidity range-5%-95% relative humidity (RH)

Product features

Easy to Read Display

This plug-in CO alarm is designed with a clear, visible readout that will accurately record the levels of carbon monoxide present so that you can quickly know if an area of your home is at risk. It measures CO levels between 30 and 999PPM, and the display will also indicate if the battery needs to be replaced.

Unbeatable Protection

Always protect your family and home by making sure you are prepared for any emergency or hazard with the Kidde plug-in carbon monoxide detector. This CO meter uses an electrochemical sensor and features a clear digital display screen to monitor and record any CO levels in any room of your house. This sensitive and clear detector will leave you confident that you are protected against carbon monoxide.

Peak Level Memory Feature

Displays the peak CO level recorded by the alarm since it was last reset or unplugged

Product description

The Kidde KN-COEG-3 AC powered, plug-in CO and explosive gas alarm protect you and your family from two deadly threats. The KN-COEG-3 includes 9V battery backup that provides protection during a power outage, when AC-only units cannot provide protection. By pressing the Peak Level Button you can see the peak CO level recorded by the alarm since it was last reset or unplugged. The continuous digital display shows you the level of carbon monoxide (if any) the unit is sensing as well as if gas is present. The gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane. Temperature range- 40 degree Fahrenheit to 100 degree Fahrenheit.

Protect your family from the dangers of carbon monoxide (CO), methane, and propane exposure with the Kidde KN-COEG-3 Nighthawk Plug-In Carbon Monoxide and Explosive Gas Alarm. The Nighthawk is an easy-to-install unit that provides reliable protection against the dangers of CO and explosive gas. The digital display shows if gas is present indicates CO levels in parts per million, allowing you to see if, how, and when levels change.

Advanced Technology in an Easy-to-Install, Plug-In Design

Designed for home use, the Kidde KN-COEG-3 Nighthawk is a UL-listed, A/C-powered, plug-in alarm that utilizes sophisticated electronic components and sensor technology to protect you and your family from the dangers of CO, methane, and propane exposure. It plugs directly into a standard A/C outlet and includes a 9-volt battery backup that provides continuous monitoring--even during power outages.

The Dangers of Carbon Monoxide, Methane, and Propane Exposure

The leading cause of accidental poisoning deaths in North America, carbon monoxide (CO) is often referred to as the silent killer because it's odorless, tasteless, and invisible. Carbon monoxide poisoning can come about via a number of sources, including everyday items and appliances in your home or office. And because symptoms of CO poisoning mimic the flu or other common illnesses it can often go undiagnosed.

Likewise, methane and propane gases are commonly used in homes for cooking, heating, and water heating. Although it happens rarely, gas leaks can sometimes occur inside the home, increasing the risk of fire or explosion.

Audible Alarm Pattern Alerts you to Elevated CO and Gas Levels

When placed on every level of your home, alarms like the KN-COEG-3 Nighthawk can help protect everyone in the house by giving you an unmistakable signal when gas levels have reached an unhealthy point. If unhealthy levels of CO are detected, the alarm will emit four quick audible beeps every five seconds until either levels decrease or the reset button is pressed. If methane gas or propane gas is detected, the alarm will emit beeps every other second with "GAS" shown in the display.

Easy-to-Read Digital Display Shows CO Levels

The KN-COEG-3 Nighthawk is preferred among traditional CO and explosive gas alarms because of its digital display. This display clearly shows levels of CO that the unit has detected and stored-- from 30 to 999 ppm--and it updates every 15 seconds to indicate any abrupt changes or alarming trends. The display also shows the peak CO level recorded by the alarm since it was last reset or unplugged. The continuous display also shows if gas is present.

LED Shows Sensor Status

With the KN-COEG-3 Nighthawk, you never have to wonder if the sensor is functioning properly. A blinking dot in the lower right-hand corner of the display denotes normal operation, so you can trust that it's working. In addition, you can test alarm function by pressing the test/reset button at any time to verify that the horn and electric circuitry are operating properly.

Convenient Mounting Options

The KN-COEG-3 Nighthawk has a low-profile design that makes it suitable for any room in your home. The detector can be plugged into any standard A/C outlet; it's plug can be snapped into the back of the unit and can be rotated so the alarm remains vertical, independent of whether the electrical socket is mounted vertically or horizontally. In addition, the alarm comes with a 6-foot extension cord, so the unit can be plugged into the wall outlet and then placed on a table or shelf. For the most thorough protection, place an alarm on every level of your home.

The UL-listed Kidde KN-COEG-3 Nighthawk has a seven-year life and is backed by a five-year limited warranty.

About Kidde: A UTC Fire and Security Brand

Renowned for global leadership in fire detection and suppression, Kidde provides solutions ranging from portable fire extinguishers to advanced industrial controls such as flame detection and explosion suppression systems. Kidde is a UTC Fire and Security brand, with a history that's rich with innovations, from the patent of the Chubb Detector Lock in 1818 to the development of the world's first wireless networked smoke detectors in 2004.

What's in the Box

Kidde KN-COEG-3 Nighthawk Carbon Monoxide and Explosive Gas Alarm, 9-volt battery, mounting hardware, and installation guide.

From the Manufacturer

The leading cause of accidental poisoning deaths in North America, Carbon Monoxide is odorless, tasteless and invisible. It is a silent killer. Kidde CO alarms include the most accurate sensing technology available, the patented Nighthawk electrochemical sensor. This unit is an AC powered, plug-in CO and explosive gas alarm that protects you and your family from two deadly threats. The 900-0113 includes 9V battery back up that provides protection during a power outage, when AC only units can not provide protection. By pressing the Peak Level Button you can see the peak CO level recorded by the alarm since it was last reset or unplugged. The continuous digital display shows you the level of carbon monoxide, if any. The unit is sensing as well as if gas is present. The gas sensor is a metal oxide sensor designed to detect natural gas , methane or propane. Install at least one CO alarm on every floor and in sleeping areas. Make sure CO alarms are at least 15 feet away from cooking or heating appliances to prevent false alarms. Replace CO alarms every 5 to 7 years to benefit from the latest technology upgrades.

• Protects you and your family from two deadly threats: Carbon monoxide and explosive gas.
• Sounder alarm – The KN-COEG-3 offers a loud 85-decibel pulsing alarm that will sound to alert you to a potential problem.
• Digital display - Displays the level of carbon monoxide the unit is sensing.
• Peak level memory - Recalls the highest CO concentration detected
• Test/reset button - Tests unit’s electronic circuitry operation and allows you to immediately silence the alarm
• Two alarms in one detects carbon monoxide and explosive gas
• Three convenient mounting options

User questions & answers

Question:	What is the sound level I need one for basement and need to hear on ground floor
Answer:	Dear cutomer, excuse that this prodcut Y301 can't detect hydrogen gas, it's mainly sensitive for methane and propane. thank you very much
Question:	is this an explosive gas and carbon monoxide detector? it only says "carbon monoxide detector" on the actual product
Answer:	Don't worry, it's normal, the large moisture change can affect the sensor performance, and may lead to false alarm, but the data on display only switch to 1,2 or 3, but won;t trigger the voice and light alarm. If the data become 5 or more than 5, voice and light alarm will be triggered. Thank you very much and best regards.
Question:	No manual included. Do I just plug it in and test it? What does it display if gas is detected? Thanks fellow Amazoners
Answer:	HI Niran, it's sensitive to methane and propane. We think it can't used to monitor and detect CO. thank you vey much
Question:	I smell natural gas in my house, and am wondering if that is the same as explosive gas? Will it detect natural gas
Answer:	Dear Karen, temporarily the Y301 doesn't get UL certification, it passed CE, FCC, EMC and RoHs. We are applying US ETL certification which is equivalent to UL certification. Thank you very much and best regards.

Product features

Plug-In Explosive Gas and Carbon Monoxide Detector with Battery Backup

The Kidde KN-COEG-3 AC powered, plug-in CO and explosive gas alarm protects you and your family from 2 deadly threats. The KN-COEG-3 includes 9-Volt battery back up that provides protection during a power outage, when AC-only units can not provide protection. By pressing the Peak Level Button you can see the peak CO level recorded by the alarm since it was last reset or unplugged. The continuous digital display shows you the level of carbon monoxide (if any) the unit is sensing as well as if gas is present. The gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane.

Carbon monoxide and gas detector plugs directly into wall outlet

Digital display updates CO level in PPM every 15 seconds

Loud 85 dBA pulsing alarm that will sound to alert you to a potential problem

Product description

The BRK SC9120B hardwire combination smoke and carbon monoxide alarm detects two hazards with one simple unit. Carbon monoxide (CO) is a colorless, odorless, deadly gas. It can be emitted by sources including gas or oil furnaces, gas clothes dryers, water heaters, fireplaces, wood stoves, charcoal grills, gas ranges, and space heaters. A clogged chimney, improper venting, and attached garages can also cause carbon monoxide accumulation. The BRK SC9120 hardwire combination smoke and CO alarm with battery backup includes these features: Quick plug in power connector for easy installation, 120 volt AC inter connectable (with maximum 18 compatible devices 12 other compatible smoke alarms + 6 compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. Automatically performs internal test of functionality. Latching alarm indicator which automatically identifies which unit initiated the alarm. Battery drawer lock and mounting bracket lock for tamper resistance. AC power indicator and alarm indicator light. Low battery warning "chirp" and missing battery tab. 9 volt battery backup for peace of mind during power outages. All BRK Electronics carbon monoxide alarms are listed to UL Safety Standard 2034 for residential carbon monoxide alarms. Includes 9 volt backup battery. 7 year limited warranty. Includes: One combination smoke and CO alarm, one 9 volt battery, and user’s manual.

• Keep your family safe with this hardwired smoke and carbon monoxide alarm; The battery backup means constant monitoring, even if there's a power failure
• Features an electrochemical carbon monoxide sensing technology as well as an ionization sensor for smoke detection.
• Indicator lights on the face of the unit display the presence of smoke or carbon monoxide, while an 85 decibel siren provides a clear, loud warning upon detection
• Can connect to other compatible BRK or First Alert detectors, to ensure all alarms will sound when threat is detected
• Simple to use, with a single test/silence button, and side load battery compartment; Tamper resistant locking brackets and universal mounting brackets make installation easy
• Rigorously tested to meet UL standards
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

User questions & answers

Question:	What is the manufacture date on these items
Answer:	Hello. Yes, but not the way you mean. When the alarms go off, there is always one alarm going off and setting off all of the others. This alarm will have a green light flashing every second as well as the red light. You have to identify that alarm and either put it in HUSH mode or unplug it and take it down to stop the others. This is intentional so that if you are not leaving the house then you are identifying and investigating where the smoke situation is and if there is danger. The HUSH mode will make the alarm require more smoke to go off and for a small amount of smoke will stop it for about 8 minutes If there is too much smoke, the HUSH mode will not stop the alarm for going off.
Question:	If the alarm goes off, how can you tell whether it's due to CO or fire if there is no voice alert
Answer:	Hello. Yes, this alarm comes with a wiring harness connector.
Question:	Because its a combo alarm where is the best place to install it since smoke rises and carbon monoxide doesn't
Answer:	Hello. The answer is no, the battery is only a temporary back up. If you want an alarm that is battery only, you will want our KN-COPE-D.
Question:	Why does this model contain the radioactive part? I am sure you are going to tell me that it is a trace amount and that it has all approvals
Answer:	Hello. When plugged in AC power, it is supposed to have a solid green LED light. When running on battery alone, it should have a green light that flickers every 60 seconds. If this is not what is happening, call us when you are on location with a ladder at 1-800-880-6788 so we can figure out what is going on and how we can resolve this.
Question:	When these are interconnected with other units, can hushing one of them hush all of them? Some of mine are in places that are hard to get to
Answer:	I paid FOR for 6 and only got 4. It’s listed as 6. I had to buy two more from Home Depot. DO NOT BUY THIS ITEM.
Question:	does it come with the hardwire connector
Answer:	Does not connect to hard wire. Only battery
Question:	Do you have to hardwire it in? Can it run on just the battery
Answer:	I just checked 2 of them, and am unable to locate that information.
Question:	How do you tell if it is working properly. Is it supposed to have a constant light
Answer:	The back cover comes off install battery and replace

Product features

Always Alert

In order to monitor your home even if you are away, this detector includes an Alarm Memory feature. If the green LED is blinking once every 16 seconds, the unit has detected CO levels of 100PPM or higher, or detected smoke and then ceased its alarm. Pressing the Test/Reset will reset the memory and inform you of the hazard detected.

Easy to Install

Ensure the safety of your family and home with the combination smoke and carbon monoxide alarm from Kidde. This is a hardwired alarm that can be used in an interconnected system, and it features a battery backup, in addition to voice alerts. Using an advanced photoelectric sensor, capable of detecting visible fire particles associated with smoldering fires, and an electrochemical sensor for CO detection, you can rest easy and feel protected.

Easy Access

If the low battery warning sounds, there is a convenient front-loading battery door so that you don’t have to remove the alarm from its mounting bracket to replace the alarm. Additionally, to ensure that there is always a properly functioning battery, the battery compartment will not close if the battery is not installed correctly.

• Combo Smoke and Co Detecor: Features electrochemical Carbon Monoxide sensing technology and photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; helps minimize the number of false alarms
• 10 Year Battery Operated: This combination smoke detector and carbon monoxide detector alarm provides 10 years of continuous power with a built-in lithium battery; provides continuous monitoring of smoke and CO levels, even if there's a power failure; an end-of-life signal will let you know when it’s time to replace the unit for safety
• Test/Slience Button: Tests the unit for proper operation and resets the carbon monoxide alarm,Alarm
• Easy to Install and Use: The alarm can easily install with mounting bracket.No hardwired anymore, very
• A loud 85-decibel alarm sounds when Carbon Monoxide, and Smoke levels begin to rise

User questions & answers

Question:	how is it wall mounted
Answer:	2 screws. Very simple.
Question:	is battery sealed
Answer:	Yes the battery is sealed
Question:	What am i doing wrong? the minute i press the the small button in the back the alarm starts going crazy. its not smoking and i tested it outside
Answer:	Don’t know why
Question:	Why is it that every single one of the 45 units I bought has a dead battery after two years
Answer:	Bought another model by elvicto and had same problem. They should last 10 years and both detectors died after 2 years. Would not trust this brand.

Product features

10 Year Battery Operated

Powered by sealed, ten year lithium batteries to provide continuous protection for ten years without battery replacement

Varying Frequency Is Ideal for Hearing Impaired

The alarm features a horn tone that has a lower and varying frequency. This makes the alarm easier to hear for the elderly and those with mild hearing loss. The loud 85-decibel alarm is designed to help wake even the soundest of sleepers. A one-touch button silences false alarms and allows you to test the unit monthly.

Dual Sensors Guard against Danger

The Combination Smoke and Carbon Monoxide Alarm features a photoelectric sensor that detects the smoke most commonly produced by smoldering fires, providing sensitive detection while minimizing false alarms from cooking smoke or shower steam. The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, such as faulty fuel-burning appliances, blocked chimneys, and generators running inside or too close to homes. Unique alarm sounds and indicator lights on the face of the detector distinguish a smoke warning from a carbon monoxide warning.

• Keep your family safe with this easy to use, battery operated carbon monoxide alarm; Battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
• Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room.The alarm sequence should last 5-6 seconds. If it does not alarm, make sure fresh batteries are correctly installed, and test it again. If the unit still does not alarm, replace it immediately
• A loud 85 decibel alarm sounds when CO levels reach dangerous levels
• To ensure complete protection make sure to place one on each level of your home and in each bedroom
• 7-year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
• All first alert CO alarms are rigorously tested to meet UL standards
• First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)

Product description

BRK Model CO250 is a single station carbon monoxide alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories, and other multifamily dwellings as defined in standard NFPA 101. Model CO250 has been fully tested and complies with, UL2034, NFPA 720, and NFPA 101 and other agencies that model their codes after the above agencies. It meets building codes where battery operated carbon monoxide alarms with silence are required and with model building codes published by the ICC. BRK Model CO250 is a state of the art carbon monoxide alarm designed to provide early warning of the presence of carbon monoxide. It features an electrochemical carbon monoxide sensor, an 85dB horn, a full function test switch and a red LED light that indicates DC power or alarm. The CO250B features a 9V alkaline battery and the CO250LB a 9V long life lithium battery. This alarm has two silence features. Low Battery Silence: Temporarily silence the low battery chirp for up to eight hours. Alarm Silence: Silence alarm for several minutes. It also features a tamper resistant locking pin that locks alarm cover to prevent removal of battery. Perfect for apartment, dormitory or hotel applications. The compact, low profile design complements any decor. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the hinged cover. When voltage drops to a pre-set warning level, the horn will “chirp” approximately once per minute to indicate a fresh battery is needed. To insure the battery is always replaced properly, the cover is designed to resist closing when the battery is missing. Designed for wall or ceiling mounting. Includes mounting anchors and screws.

From the Manufacturer

BRK Model CO250 is a single station carbon monoxide alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories, and other multifamily dwellings as defined in standard NFPA 101. Model CO250 has been fully tested and complies with, UL2034, NFPA 720, and NFPA 101 and other agencies that model their codes after the above agencies. It meets building codes where battery operated carbon monoxide alarms with silence are required and with model building codes published by the ICC. BRK Model CO250 is a state of the art carbon monoxide alarm designed to provide early warning of the presence of carbon monoxide. It features an electrochemical carbon monoxide sensor, an 85dB horn, a full function test switch and a red LED light that indicates DC power or alarm. The CO250B features a 9V alkaline battery and the CO250LB a 9V long life lithium battery. This alarm has two silence features. Low Battery Silence: Temporarily silence the low battery chirp for up to eight hours. Alarm Silence: Silence alarm for several minutes. It also features a tamper resistant locking pin that locks alarm cover to prevent removal of battery. Perfect for apartment, dormitory or hotel applications. The compact, low profile design complements any decor. Battery installation and removal can occur while the unit is mounted to the ceiling or wall via the hinged cover. When voltage drops to a pre-set warning level, the horn will “chirp” approximately once per minute to indicate a fresh battery is needed. To insure the battery is always replaced properly, the cover is designed to resist closing when the battery is missing. Designed for wall or ceiling mounting. Includes mounting anchors and screws.

• HIGHEST QUALITY, most accurate electrochemical co sensor technology
• CONVENIENT, end of life chirping signal
• HELPFUL, 2 silence features that silence both alarm and low-battery chirp
• FEATURES, 9-Volt Battery and all necessary mounting hardware
• Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
• Electrochemical CO Sensor is the most accurate technology available
• Two Silence Features Silence Low Battery Chirp For up to 8 Hours

User questions & answers

Question:	Is this a 5 yr or a 7yr warranty
Answer:	I don't remember and have moved to another home. I replaced the originals because they were beyond there life expectance.
Question:	Will this detector work with a magnetic mount that needs a flush to ceiling back and battery change with a magnet glued to back of unit
Answer:	I love these Alarms... It may work... Good ideal...
Question:	is this detector certified for use in rv's
Answer:	I see RV's use unconditioned CO detectors that aren't temperature controlled. I wouldn't use it in an RV.
Question:	The description says 120 volts. Is it? Looking for 9volt only
Answer:	That's GOT to be a typo, this is NOT hard-wired to your house, it requires your plain 9-volt battery.

Product features

About First Alert

For nearly 60 years, First Alert has been a leading innovator in the home safety industry, helping its customers protect what matters most. From smoke detectors and carbon monoxide alarms to security cameras and safes, the company manufactures reliable, technologically advanced products that offer a sense of preparedness and peace of mind. First Alert also takes pride in community outreach and has maintained a longstanding commitment to fire service support and safety awareness.

• Combo smoke detector/carbon monoxide alarm detects two threats
• Electrochemical CO sensor alerts you to carbon monoxide danger
• Photoelectric sensor detects smoke while minimizing false alarms
• Battery-operated unit installs quickly and easily without an electrician，A single button tests the unit or silences the alarm. Low battery signal mute, quiets low battery signal for up to 8 hours
• 5 YEARS WARRANTY

User questions & answers

Question:	I cannot get power light to illuminate. Had smoke fill kitchen from pellet stove with no alarm from either device. Any tips
Answer:	Yes. VdS, TÜV Rheinland, BSI, ETL, and CCCF. UL 2034 (US) and EN 50291 (EU)
Question:	How does it show real time carbon monoxide levels and what not if the lcd screen does not stay on? Maybe I got a defective one
Answer:	Stairwell
Question:	Do theses need to be replaced in 5 years? it says 5 year warrnty some sy 7 some say 10yrs. what is the reccomendation on these
Answer:	Not thus far.
Question:	I cannot get power light to illuminate. Had smoke fill kitchen from pellet stove with no alarm from either device. Any tips
Answer:	Hello Bob, it's the Alorva team here. We do not provide moisture reduction packets, however, if you feel you need that added protection from moisture, feel free to do so. Some customers are constantly adding and taking out documents from their bags all the time and this airflow that is introduced is sufficient to keep moisture to non-existent levels. Thanks and have a Merry Xmas, The Alorva team.

Product features

Alerts You to Danger

When a threat is detected, the smoke and carbon monoxide alarm sounds a loud 85-decibel siren that is designed to wake even the soundest of sleepers.

A single button allows you to silence alarms and test if the device is working.

Battery Operated for Convenience

The battery-operated dual CO smoke alarm installs in minutes, without requiring an electrician. The unit requires two 1.5V AA battery and features a chirp and indicator light to let you know when they need replacing. The alarm mounts easily to a ceiling or wall and comes with pins to secure alarm to the base to prevent tampering.

Sleek, Low-Profile Design

Half as thick as a standard alarm, the Photoelectric Smoke and Carbon Monoxide Alarm packs premium detection features into a sleek, compact unit. The ultra-thin design features a white finish that blends seamlessly with most home decor.

Product description

Have you taken any measures to protect yourself in case of fire or carbon monoxide poisoning? In fact, most people don’t take adequate precautions. This jeopardizes their health, safety and…bank account.

An unexpected fire could be controlled if you just had a smoke detector. On the other hand, you could save yourself from serious carbon monoxide poisoning with a carbon monoxide detector.

Now You Can Have Both Of Them In One Device:

Why install two units when you can install only one? Our amazing photoelectric smoke and carbon monoxide detector will save you thousands of dollars in advance and maybe even your life!

Why This Is The Best Smoke Alarm & Safety Precaution You Could Ever Take:

Save money by buying a combo 2 in 1 detector while keeping yourself safe.

Battery safeguard ensures that your detector won’t be accidentally mounted without batteries installed.

Compact size and easy installation makes this innovative device your #1 choice.

It comes along with a 5 year warranty. Risk & Hassle Free!

Low battery signal indicates when you need new batteries



If you want the assurance that you are buying the #1 photoelectric smoke and carbon monoxide detector, then you should definitely get this one!

Order Now & Sleep Without Worrying About Anything!

• Combination Smoke Detector and Carbon Monoxide Detector Can Detect the threat of these Two Gases
• SOUND AND LIGHT ALARM --- When a dangerous level of carbon monoxide is detected the red light will flashes and a loud alarm pattern will sound--Loud 85 decibel carbon monoxide alarm with red light flash to protect your family's life and property safety from CO detector
• APPLICATION CO DETECTOR PLACE---This carbon monoxide detector suitable for all where it is possible to produce carbon monoxide, such as your home kitchen, bedroom, bathroom, hotel, or you are in the barbecue time, your parking garage
• ENERGY SAVING --- Operated by 9V Batteries, You can hear the alarm when the power is low¬don't worry about when to replace the battery
• Quick & Easy Installationy: Requires no rewiring; easy to mount on any wall or ceiling with the included mounting bracket, screws and anchor plugs

User questions & answers

Question:	How can you tell if it is carbon monoxide or when it is smoke
Answer:	I placed the negative on the scanner and places the light on top, flat against the scanner and it was too much light. They were very good negatives but old. It came out with faint marks on the picture but nothing you could make out.
Question:	Will this product detect natural gas
Answer:	I would search for this on amazon. AC/DC adapter Model: KA24-1201000US INPUT: 100- 240VAC OUTPUT: 12V---1000mA
Question:	Why do the instructions advise against mounting the device within 15 feet of a furnace? Doesn't that defeat the purpose
Answer:	I would not, for I do not want any imperfection on it surface. Any scratch or dent into the light box surface would transfer by tracing or drawing.
Question:	Are these ul certified? i have seen mixed reviews some say yes some say no
Answer:	Hi Sandra- The surface is a plastic. It's very smooth and is just like glass. I am loving the very bright but dimmable LED light. I was looking for a traditional light box for use in my interior design business, so when I saw this I was excited but a little skeptical. I love it, better than I thought.

Product description

The ET110 CO Detector is an easy-to-use meter that detects and measures concentration levels of carbon monoxide (ppm) and temperature (Fahrenheit/Celsius), making it the perfect choice for HVAC professionals. Features backlit LCD screen, warning indicator light, audible and visual alarms and multiple function buttons. Includes carrying pouch and 4xAAA batteries. Carbon Monoxide Tester detects and measures CO gas concentration. Backlit display with CO measurements from 0 - 1000 ppm. Carbon Monoxide Meter with audible and visual alarms. Auto-power off after 20 minutes of no usage helps conserve battery life. Includes carrying pouch and 4xAAA batteries. Meter is NOT intended for use as personal protection equipment. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

• Easy-to-use CO meter detects and measures concentration levels of carbon monoxide gas
• Portable CO detector with user protection and short-term exposure limit (STEL) alarm
• Low level alarm (35 ppm) and high level alarm (200 ppm)
• Audible and visual alarms
• Backlit display with CO measurements (0 to 1000 ppm) and temperature (Farenheit and Celcius)

User questions & answers

Question:	Accuracy spec(s
Answer:	Hi， The dielectric material of the KMR400 cable is Physical Foam Polyethylene. The medium material of UHF connector is PTFE (Teflon).
Question:	Could this be used to check co2 in the coolant system in a car to check for a blown head gasket
Answer:	Hello friend, when charging the battery, the power LED light is on red, after fully charged the LED light will go out, thanks.
Question:	Is the case included
Answer:	Hello friend, yes this will work for that well, as the 5.5mm diameter tiny endoscope camera probe will help you look inside the walls, with the adjustable LED Lights and 1080P HD resolution it can also help you identify any animals within, thanks.
Question:	I would like to use this to measure Co levels in customer warehouses where they run propane forklifts would this be a good tool for that
Answer:	Hi friend Glad to help you. KZ2000 is Industrial Endoscope not Microscope, so sorry that it can't tell the mold, but you can use it to see the back of the drywall if If there are holes in the drywall. Best Wishes KZYEE TEAM

Product features

Carbon Monoxide Meter

The ET110 is an easy-to-use meter that detects and measures concentration levels of carbon monoxide (ppm) and temperature (Fahrenheit/Celsius), making it the perfect choice for HVAC professionals. Features backlit LCD screen, warning indicator light, audible and visual alarms and multiple function buttons. Includes carrying pouch and 4xAAA batteries.

• Electrochemical sensor, which is composed of a pump and a microprocessor, can accurately and efficiently reflects the detection data on the screen.
• It will alarm wearer to take corresponding protective action by sound, light and vibration once the environmental CO gas concentration exceeds the preset alarm point.
• Portable Small Size 110mm*45mm*32mm with IP67 waterproof and dustproof body, it’s also passed 2 meters drop test and have a 25~55℃working temperature range, you can take it wherever you want to go, it doesn't take up space.
• This CO detector can be used continuously for 2 years if it is kept in a 24-hour working state.
• You can contact our development engineer via amazon email.If you have any questions, please feel free to contact us.

User questions & answers

Question:	does it need to be recalibrated? How do you do it
Answer:	Any incandescent/filament lamp/bulb can work with AC or DC. It won't have any good reason to 'care' which it is.
Question:	I can’t unscrew the back. What tool will supposedly open it
Answer:	I got this to replace the bulb in my old "Tensor" model 9100 desk lamp with a 2 stage switch. It says "Use #93 bulbs only" on the lamp bottom, so I took a shot. Not only does this fit, it puts out a much cleaner light, with less heat than the bulb that was in it, so I'm delighted. It also seems to be handling the 2 stage switch fine, and is slightly brighter on one level, than the other, though it is subtle. Do I need 10 of them, not likely, but I'm happy with it so far (about 10 minutes use, thus far.)
Question:	Is the product UL certified
Answer:	These say blue on the box. They are the new Premier Tubes. We receive new shipments from the manufacturer every month.
Question:	Can the battery be recharged or will the unit need to be replaced after 2 years
Answer:	The diameter of these tubes are 8mm. If you have any more questions, feel free to contact Customer Service at [email protected] or 800-992-7427.