13 best esr meters

• Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.
• Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.
• Measuring range from 0.001 to 100.0R, support IN CIRCUIT Testing.
• Auto-ranging capacitor ESR and Low Ohm Meter.
• Wide Measurement Range

User questions & answers

Question:	Can this unit test capacitors as small as 5 Volt 15 PF
Answer:	As long as the Capacitor is discharged, yes than you can measure it's value in 15 pf. AK
Question:	can this meter perform a leak test on motor start capacitors
Answer:	No. This meter is for one test only - ESR of a capacitor. It does not perform any other tests.
Question:	Is there a way to confirm it's v2 with sine wave and not v
Answer:	In the description on my order it is listed as V2. On a scope, with the meter open circuit, the test waveform is a rounded square wave. When connected to a 100 ohm resistor, the waveform is more of a triangle wave. When connected to a capacitor, it is somewhere between a triangle and a sine wave.
Question:	Does this come with an instruction or user manual of sorts
Answer:	A small (pocket size) instruction booklet is included. I was not impressed with the MESR100 V2. My opinion of this product, it is a toy tester, the cables are much too short. I was dragging the tester all over the circuit board trying to get readings because of the (WAY TOO SHORT CABLES.) I 1st used it on a sound bar that was not working which has several electrolytic caps. Some had bulging tops, yet the tester indicated every caps was within specs. I also tested some electrolytic caps in a electronic siren (also not working) and the same results. I also tested other non working products, again the same results. ***I highly suggest you save your money and get a well known brand***.Hope this helps you.

Product features

Advantage of V2:

• 1) Change square wave to sine wave 100 KHz, reduce square wave’s high frequency component, and affect the reading passing the test leads and capacitor.
• 2)Higher Resolution up to 0.001 ohm.
• 3)128X64 dot matrix LCD, with larger value display and information
• 4)Embedded 25V capacitor table at LCD, auto display the capacitor is good or bad reference to common 25V electrolytic capacitor.
• 5)New plastic case, curve design for hand carrying. New stand for 60 degree stand on desk.
• 6)Use 2X AA battery, more convenience and longer battery life than 9V battery.
• 7)Support external USB power, using standard micro-USB port.

Features:

• It is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C).
• The impedance become small, and we can then measure the true series resistor value.
• Using this theory, we can measure the capacitor is bad/ damaged or good in condition.
• Our ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result we can use it as in circuit test.
• During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not.
• Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.

Specification:

• 1)Accuracy: Up to 1% (detail on above table)
• 2) High Resolution: 4 digit, or 0.001Ohm @ 1 Ohm range
• 3)Measuring voltage: <~40mV RMS (TESTING VOLTAGE)
• 4)Clamping voltage: ~0.15V (open voltage)
• 5)Battery 2X AA 1.5V battery
• 6)External Power: 5V micro USB
• 7)Operating current0.02A
• 8)Battery Life time: >80 Hours

Parameter

• Item Size: Approx 14.5 * 8 * 3cm / 5.7 * 3.1 * 1.2in
• Item Weight: Approx 139.6g / 4.9oz
• Package Size: Approx 17 * 9 * 5cm / 6.7 * 3.5 * 2.0in
• Package Weight: Approx 218g / 7.7oz

Package List:

• 1 * Capacitance Meter
• 2 * Test Clips
• 1 * User Manual

• External Power: 5V micro USB
• ❤❤❤[ESR of Capacitor] It is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C). The impedance become small, and we can then measure the true series resistor value. .Using this theory, we can measure the capacitor is bad/ damaged or good in condition.Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.
• ❤❤❤【High Performance】Dual terminal， MESR-100 V2 automatic range capacitance ESR and low ohmmeter for quick and easy inspection of general purpose capacitors or resistors. Suitable for TV, LCD, audio board repair and capacitor testing.Dual terminal for your convenience a printed ESR table for fast check.
• ❤❤❤【Backlight Design & Auto Sleep】 Auto Polarity Display, Easy to Read Large Backlit LCD Display, Back-light Makes a Real Difference in Low Light Areas.support automatic sleep, no test for about 10 hours, it will automatically turn off to save power.
• ❤❤❤【Powerful test function】 Measurement range from 0.001 to 100.0R, support IN CIRCUIT test, can apply DC or peak-to-peak value of less than 15mV on a good capacitor, and measure ESR value with true 100 KHz sine wave.Auto Range or Manual Range, You can Easily Select the Mode by Pressing Measuring Button; You can Easily Select the Mode by Pressing SELECT Button until the Continuity Symbol Appears on the Screen.
• ❤❤❤【Nice Protective Shell】 - The Case with Our Multimeter is Some Kind of Non Slip, Slightly Soft Plastic that Will Help with Drop Protection, The Stand Places the Device at a 45° Angle and Makes the Screen Easy to See Hands Free.

Product features

KKmoon MESR-100 capacitor tester

This MESR-100 V2 auto-ranging capacitor ESR and low Ohm meter measuring range from 0.001 to 100.0R, support in circuit testing. Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.

ESR LCR Capacitance Ohm Meter Professional Measuring Capacitance Resistance Capacitor Circuit Tester

ESR of Capacitor：It is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C). The impedance become small, and we can then measure the true series resistor value. .Using this theory, we can measure the capacitor is bad/ damaged or good in condition.Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.

High Performance：Dual terminal， MESR-100 V2 automatic range capacitance ESR and low ohmmeter for quick and easy inspection of general purpose capacitors or resistors. Suitable for TV, LCD, audio board repair and capacitor testing.Dual terminal for your convenience a printed ESR table for fast check.

Backlight Design & Auto Sleep：Auto Polarity Display, Easy to Read Large Backlit LCD Display, Back-light Makes a Real Difference in Low Light Areas.support automatic sleep, no test for about 10 hours, it will automatically turn off to save power.

Powerful test function：Measurement range from 0.001 to 100.0R, support IN CIRCUIT test, can apply DC or peak-to-peak value of less than 15mV on a good capacitor, and measure ESR value with true 100 KHz sine wave.Auto Range or Manual Range, You can Easily Select the Mode by Pressing Measuring Button; You can Easily Select the Mode by Pressing SELECT Button until the Continuity Symbol Appears on the Screen.

Nice Protective Shell：The Case with Our Multimeter is Some Kind of Non Slip, Slightly Soft Plastic that Will Help with Drop Protection, The Stand Places the Device at a 45° Angle and Makes the Screen Easy to See Hands Free.

MESR-100 circuit tester

Precision range :

• 0.000 to 1.000R 1% + 2Digit ~ 0.4s
• 1,000 to 10.00R 1% + 1Digit ~ 0.4s
• 10.00 to 100.0R 2% + 1Digit ~ 0.4s

Test the capacitor :

• Tested with 1,10, 100R Auto mode take 0 to 2s.
• During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not.

Package List :

• 1 * Capacitance Meter
• 2 * Test Clips
• 1 * User Manual

Size :

• Item Size: Approx 14.5 * 8 * 3cm / 5.7 * 3.1 * 1.2in
• Item Weight: Approx 139.6g / 4.9oz
• Package Size: Approx 17 * 9 * 5cm / 6.7 * 3.5 * 2.0in
• Package Weight: Approx 218g / 7.7oz

Product description

1. 100 / 120 / 1k / 10k / 100k Hz test frequency

2. Dual 19999/1999 display

3. Backlight

4. Ls / Lp / Cs / Cp / Rs / Rp / dissipation factor (D) / quality factor (Q) /phase angle/ ESR LCR auto selection

5. Auto Ranging mode

6. Auto Serial / Parallel mode

7. Components sorting function

*Selectable tolerance ±0.25%, ±0.5%, ±1%, ±2%, ±5%, ±10%, ±20%, -20% +80%

8. Low battery indication

User questions & answers

Question:	Does this product reliably mesure small capacitances (<50pF) and small Inductances (<1uH
Answer:	I would suggest constructing a set of kelvin clips (there are many youtube links about this) for measuring capacitances and inductances this small.
Question:	Does it currently (as of today April 25 2018) come with power adapter too? or may be currently as a gift or something
Answer:	The power adapter is sold separately. I got mine on eBay. Just search DE5000 Adapter and it'll be there.
Question:	What is the lowest inductance range
Answer:	lowest range is 20.000 uH so it will measure down to 0.001 uH at 2.5% 100KHz
Question:	Does it test capacitors in circuit as well as out of circuit like the atlas esr70 does
Answer:	It can, but like any tester, it will be affected by connected components. ESR test is usually pretty reliable in-circuit as it sends 100kHz (or whatever frequency you pick from the selection) and the impedance of a good cap will be low - 1-2 ohms typically so parallel components should not show up. Capacitance may not be, depends as it will measure all capacitance in-circuit across the node (across the capacitor). Large electrolytics may test close enough, small caps probably not. The other tests, Q, leakage, etc are not in-circuit tests.

Product description

1This MESR-100 V2 auto-ranging capacitor ESR and low Ohm meter measuring range from 0.001 to 100.0R, support in circuit testing. Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.

Features:

It is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C).

Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.

Specifications:

Color: Black

Range         Accuracy(After zero,     Refresh Time(Manual Mode)

            tested with 1,10,100R    Auto mode take 0 to 2s, more time

            resistor)            depends on capacitance value.

0.000 to 1.000R  1%+2Digit             ～0.4s

1.000 to 10.00R  1%+1Digit             ～0.4s

10.00 to 100.0R  2%+1Digit             ～0.4s

Accuracy: Up to 1% (detail on above table)

Wide Measurement Range: >1uF

High Resolution: 4 digit, or 0.001Ohm @ 1 Ω range

Measuring voltage: <～40mV RMS (TESTING VOLTAGE)

External Power: 5V micro USB

Operating Current: 0.02A

Battery: 2 * AA 1.5V Battery (not included)

Battery Life time: >80 Hours

Item Size: Approx 14.5 * 8 * 3cm / 5.7 * 3.1 * 1.2in

Item Weight: Approx 139.6g / 4.9oz

Package Size: Approx 17 * 9 * 5cm / 6.7 * 3.5 * 2.0in

Package Weight: Approx 218g / 7.7oz



Package List:

1 * Capacitance Meter

2 * Test Clips

1 * User Manual

 

• It is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C).
• The impedance become small, and we can then measure the true series resistor value.
• Using this theory, we can measure the capacitor is bad/ damaged or good in condition.
• Our ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result we can use it as in circuit test.
• During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not.

Product description

Specifications:

Color: Black

Range         Accuracy(After zero,     Refresh Time(Manual Mode) 

            tested with 1,10,100R    Auto mode take 0 to 2s, more time 

            resistor)            depends on capacitance value.

0.000 to 1.000R  1%+2Digit             ～0.4s

1.000 to 10.00R  1%+1Digit             ～0.4s

10.00 to 100.0R  2%+1Digit             ～0.4s

Accuracy: Up to 1% (detail on above table) 

Wide Measurement Range: >1uF

High Resolution: 4 digit, or 0.001Ohm @ 1 Ω range

Measuring voltage: <～40mV RMS (TESTING VOLTAGE)

External Power: 5V micro USB

Operating Current: 0.02A

Battery: 2 * AA 1.5V Battery (not included)

Battery Life time: >80 Hours

Item Size: Approx 14.5 * 8 * 3cm / 5.7 * 3.1 * 1.2in

Item Weight: Approx 139.6g / 4.9oz

Package Size: Approx 17 * 9 * 5cm / 6.7 * 3.5 * 2.0in

Package Weight: Approx 218g / 7.7oz



Package List:

1 * Capacitance Meter

2 * Test Clips

1 * SMD Clip

1 * User Manual

• -- This MESR-100 V2 auto-ranging capacitor ESR and low Ohm meter measuring range from 0.001 to 100.0R, support in circuit testing. During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not.
• -- This ESR capacitance tester is a series resistor inside capacitor, using 100kHz to remove the impedance 1/(2*pi*F*C). The impedance become small, and we can then measure the true series resistor value.Using this theory, we can measure the capacitor is bad/ damaged or good in condition.
• -- Our ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result we can use it as in circuit test. Using true 100 KHz sine wave to measure the ESR value, which is equal to the testing method of capacitor manufacturer.
• -- This ESR meter is equipped with a SMD alligator clip for more accurately testing. Copper plating on the surface, which is anti-corrosion and oxidation resistance.
• -- Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check.

Product description

Features:

- A key operation, boot test, a key to get.

- Automatically test the pin elements and display them on the LCD

- Automatic detection of NPN, PNP bipolar transistors, N-channel and P-channel MOS field-effect transistors, junction type FET, diodes, diodes, thyristors, low power unidirectional and bidirectional thyristors.

- Automatic identification element pin arrangement.

- Bipolar transistor current amplification factor and base-emitter threshold voltage measurement.

- Identify the LCD transistor by the base emitter threshold voltage and the high current amplification factor.

- Gate MOS FET threshold voltage and gate capacitance measurement.

- Two resistors and resistor symbols can be measured simultaneously. The right shows a decimal value of 4. Both sides of the resistor symbol show the number of pins.

- Can measure a single diode reverse capacitance. If the bipolar transistor is connected to the collector and emitter of the base and pin, the collector or emitter junction reverse capacitance can be measured.



Parameters:

- Resistor: 0 - 50MΩ; Resolution: 0.01Ω

- Capacitor: 25pF - 100mF; Resolution: 1pF

- Inductor: 0.01mH - 20H; Resolution: 0.01mH

- Capacitor ESR: 2uF - 50mF; Resolution: 0.01Ω



Package Contents:

1 x ESR02 PRO Digital Transistor Tester

1 x English User Manual



Notes:

- Before testing the capacitor, be sure to discharge it, otherwise it may damage the internal circuit

- If using DC power supply, please choose DC 9V - 12V adapter (including 9V and 12V)

- It is powered by 1pcs of 9V 6LR61 battery, when the battery power is under 6V, please replace it with a new one.

• [Wide Application]: It is very easy to test plug-in and SMD devices, it can also be used to test different kinds of triodes, thyristors, MOSFET, enable to analysis the device type, the polarity of the pin, the output HFE, the valve voltage, the junction capacitance of the FET.
• [Automatical Identification]: Intelligent transistor checker is able to detect NPN and PNP transistors, N-channel and P-channel MOSFET, diodes, thyristors, resistors, capacitors or other devices automatically.
• [Typical ESR Value Guide]: There is a table "typical ESR value of electrolytic capacitor" at the back, it is for guiding only, these are typical value for standard grade electrolytic capacitor at room temperature.
• [Easy to Use]: Our advanced electronic transistor tester owns auto shut-down function. Auto power off 20 seconds after measurement. Large LCD display with backlight function for easy reading.
• [Attention]: Be sure to discharge the capacitor before testing it, otherwise it may damage the internal circuit. It is powered by 1pcs of 9V 6LR61 battery, when the battery power is under 6V, please replace it with a new one. Choose DC 9V-12V adapter (including 9V and 12V) if using DC power supply.

User questions & answers

Question:	Can this test while in circuit
Answer:	From what I've tested so far with capacitors and resistors it is able to test in circuit. For myself I use a bit of caution as this does send voltage through the components.
Question:	This product has failed and i am beyond the return window. would u plz allow return? i would not want to give you negative feedback. get back plz
Answer:	What is wrong with it? I might be able to help you repair it.
Question:	Does this meter function in the same way as mesr-100 or not? in other words, can it reliably test capacitors in-circuit (to detect good vs bad unit
Answer:	I do not own an mesr-100. I don’t use this device to test capacitors in-circuit, I use my de-5000, which has been very accurate for me.
Question:	Is this a true ESR meter and what is the country of manufacture
Answer:	This meter is fairly good at giving a ballpark answer about ESR. There is a video review of an older, cheapie version of this meter (an open source project), done by Dave of EEVblog, titled "Is a $7 LCR Meter / Component Tester from Ebay any good?" The description says, "Dave tests the M328 (LCR-T4) model component tester." and can be watched at https://www.youtube.com/watch?v=7Br3L1B80ow In the review, you will see Dave actually testing components, and even commenting on the fact that some ESR readings seem on, and other ESR readings are not so much on target. But the real utility in this meter is for quick sorting of resistors and other components in putting kits together, collecting unknown parts from junk electronics and then using them, and this meter does a pretty good job of quickly identifying all kinds of parts, especially which pin is which, so this meter is really, really good at answering the question, "what in the world is this thing?" and also "will I insert it correctly?" and also "what is it, and is it working?". Watch the video, and it will answer your question pretty well. Is this a true ESR meter? Fair to middlin'. Should you buy it? It's very useful. So, definitely buy it, in my opinion. I am about to buy a few, but of different kinds, and for different reasons, actually. Just make sure you discharge capacitors before testing them, and that may be why I actually choose this meter over many of the others... ...it helps you to remember to discharge capacitors by having, on the front panel, a built-in place clearly-labeled where you can discharge your capacitors before measuring them. That's over and above the effort that the other cloners have put into making their versions. Just make sure, if it's a high energy capacitor (high voltage and/or high capacitance), then discharge it with safety glasses on and a big, beefy screwdriver (actually fun, but not to do around combustibles, you know, at least not without the fire extinguisher -- you DO have a fire extinguisher, don't you, and it is fully charged and up-to-date on it's inspections, right ;-). And, to finally sort of answer your unasked question, yeah, I really don't want to have to buy a real ESR meter that costs hundreds of dollars either! ;-) Perhaps someone will contribute to the open source project and bring these little component testers to the next level. If you benefit from open source, you may just consider giving back, as I am trying to do (yes, it's hard, with life and all, but we will all be just a little better if we all help a little -- I've seen a group of people lift a car when they had to.) Hope this helps.

Product description

Description:

- For detecting NPN and PNP transistor, capacitor, resistor, diode, triode, N-channel and P-channel MOSFET, IGBT, JFET, triac and battery, etc.

- Can also be used to detect infrared wave forms.

- After detection, align the infrared remote control with the ""IR"" light, then press the button in the remote control, if the detector successfully decode it, it will display the data code and infrared wave form.

- One button operation, automatically detect and shutdown, and you can also press the multi-functional button to close the detector.

- Put the pins of component in corresponding area, then dial the little handle and the detector will test it automatically, finally the results will display on the back light TFT screen clearly.



Specification:

- Self test with automatic calibration

- Color: White

- Size: 8.8x7x2.8cm/ 3.46x2.76x1.10 inch

- Display: 1.8 inch TFT Screen, Color Screen

- Diode Range: less than 4.5V

- Zener Diode:Transistor Detect Area: 0.01-4.5V

- Zener Diode Detect Area: 0.01-30V

- Triac Range: IGT less than 6mA

- Capacitance: 25pF-100mF

- Resistor: 0.01-50MΩ

- Inductance: 0.01mH-20H

- Power Voltage: 3.7V

- Power: Built-in Rechargeable Lithium Battery



Package Includes:

1 X Multi-functional TFT Transistor Tester

1 X Electronic Component Set

3 X Pieces Test Hook

1 X Piece Cable"

• For detecting NPN and PNP transistor, capacitor, resistor, diode, triode, N-channel and P-channel MOSFET, IGBT, JFET, triac and battery, etc.
• Can also be used to detect infrared wave forms.
• After detection, align the infrared remote control with the "IR" light, then press the button in the remote control, if the detector successfully decode it, it will display the data code and infrared wave form.
• One button operation, automatically detect and shutdown, and you can also press the multi-functional button to close the detector.
• Put the pins of component in corresponding area, then dial the little handle and the detector will test it automatically, finally the results will display on the back light TFT screen clearly.

User questions & answers

Question:	instructions for testing ESR of a capacitor
Answer:	its automatic...you put the item to test into the zero-force connector, close the connector, hit the test button and it detects the item and returns differing info for each type of item...for caps it returns capacitance, ESR and vloss.
Question:	Can this test for ESR in capacitors
Answer:	yes it identifies capacitors...returning capacitance, ESR and vloss. does not show polarity. Others have questioned the accuracy but I have no way to verify it either way...I am a hobbyist so I use it to see if devices are way out of whack which it seems to do adequately...it has been great for me for the price.

Product description

This new model introduces new features including “Audible Alerts” and enhanced measurement range. Every measurement of ESR will be shown on the display as usual, but the unit will also produce a variety of tones depending on the value of ESR. , including “Bell-like” pings for nominal ESR values and a “Beep-Barp” type tone for ESR that is likely to be too high. There is also a reassuring “Blip” when the measurement has started and completed. The ESR measurement range has also been enhanced, now doubled, measuring from 0 to 40 ohms with a resolution as low as 0.01 ohms. This remarkably fine resolution is great for assessing large capacitors and even allows you to use the Atlas ESR70 for tracing short-circuits and finding the precise area of a PCB that has that invisible wisp of solder. Great Service Aid Measuring a capacitor's ESR (equivalent series resistance) is a great indicator of capacitor condition. The Atlas ESR70 offers instant results, just connect the probes and press test. You can even use the Atlas ESR70 in-circuit, saving you the trouble of removing capacitors. When testing capacitors out-of-circuit, the unit will also display the capacitance to 0.2uF resolution. ESR can be a tricky thing to measure, which is a shame, it's a very useful diagnostic parameter. Of course, ESR meters are available from various sources, some are very famous in the repair sector, but the Atlas ESR70 is more than just another ESR meter. For a start, it's smart, both in looks and in brain. It can measure and compensate for the effects of measuring in-circuit, it also knows that you don't want to be hassled with capacitor polarity. This unit is designed with the real world in mind. Some capacitors can be charged up, a lot, but the Atlas ESR70 doesn't mind. If your capacitor is charged, the unit will automatically carry out a controlled discharge procedure before measuring the capacitance and ESR. Datasheet is available at alltronics.com.

User questions & answers

Question:	so it only checks capacitance of .1uf or higher
Answer:	Its capacitance measurement range is 1uF to 22,000uF with 0.2uF accuracy.
Question:	Can this unit be used to test capacitors in circuit (without unsoldering
Answer:	Atlas ESR can be used in the circuit. For this reason, also be measured without removing the capacitor from the substrate. Of course, even if you test a capacitor is removed from the circuit, can be measured.
Question:	I work on old Amps, can it test 350 volt & 450 volt capacitors.this question is pertaining to the Atlas ESR
Answer:	As others have mentioned, it can test those capacitors if they are in their discharged state.The manufacturers specs say - it can auto discharge up to +/- 50v and for a cap that is less than 10uF the absolute maximum it can withstand is +/- 275v, over 10uF that is +/- 50v
Question:	What type of leads come with the unit, i. e. alligator/pin probe
Answer:	The unit has an alligator clip on each lead. This is a great little piece of test equipment. I was checking the caps in my old HP 1710A O-scope and it found three bad ones. When I unsoldered the cans from the circuit board I could see where the electrolite was pushing out of each one. I really like this thing. Highly recommend it.

Product description

DROK Electronic Component Tester



Parameters:

-- Voltage supply: DC 9V Battery 6F22 (NOT Included)

-- Transistors range: 2 or less (including 2) P-N junction transistor

-- Resistors range: 0.5Ω - 50MΩ

-- Capacitors range: 25pF-100000uF

-- Inductors range: 0.01mH - 20H

-- Dimensions: 70mm × 135mm × 24mm



Operating Instruction:

>> The pins of the electronic components can be connected to the 1,2,3 pin optionally. This multifunctional meter is automatic identification type,

which can detect the pin sequence, graphic display and parameters automatically.

>> Eg. If you want to test a triode, you do not need to worry about the BEC order of 1,2,3 pin.

You just insert the triode into the testing interface optionally and then push the testing

button. The meter will identify it if it is triode, field-effect tube, controlled silicon or resistance capacitance.

After that, the tester will detect it if it is NPN OR PNP and then the BCE order and other information.



Testing Range:

▶ Range of Transistor: Less than 2 (included 2) transistor which is made up of PN junction. Do not have any other resistance components in the interior.

▶ Range of Resistance Testing: 0.5Ω-50MΩ

▶ Range of Inductance Testing: 0.01mH-20H

▶ Range of Capacitance Testing: 25pf - 100000uF



Package includes:

1× Multifunction Transistor Tester

• ✔ WIDE APPLICATION: This multifunctional capacitance meter can be used to test triode, field-effect tube(FET), diode, resistor, capacitor, inductor, MOS, SCR, which is available for various electric transistor testing.
• ✔ LARGE & CLEAR LCD DIGITAL DISPLAY: This amazing detector adopts 1.8" TFT color LCD screen with high-resolution. Besides, different parameter is shown with different color, convenient and simple for you to check the parameter.
• ✔ AUTOMATICAL IDENTIFICATION: DROK intelligent transistor checker is able to detect NPN and PNP transistors, N-channel and P-channel MOSFET, diodes, thyristors, resistors, capacitors or other devices automatically.
• ✔ BATTERY POWERED: This monitor is powered by DC9V battery (not included).
• ✔ AUTO SHUT-DOWN FUNCTION: Our advanced electronic transistor tester owns auto shut-down function. There is shutdown countdown displayed on the monitor and the shutdown countdown time can be extended to 40s.

User questions & answers

Question:	will it tell me the pin identification
Answer:	With in reason. You will need the spec sheet, say you have a bad unit, it may identify it as two diodes and you know it is not two diodes, it is a 222. So YES it will / it has done it correctly for me on good devices, on devices that fail, it may show unknown device or something like a mess of diodes or something else. Nothing the spec sheet would show. hope this helps. I also use a Heathkit transistor tester so I can supply a load. If you are working with hard to replace /find items, I suggest you also get something that will supply a real load so you can see if it breaks down after 2 minutes or something like that. hope this helps, I am pleased with cost vs use I have gotten. SO far so good. Get used to getting the pins in 1 2 3 any way, but 1,2,3. George
Question:	I am trying to measure a inductor and it keeps coming back with a resistance. How do I fix this
Answer:	I found out that the tester can’t measure inductance below 10uH. It helps to buy a pack of inductors of various values to always check the tester. This is how I found out that mine cant’ measure inductors below 10uH.
Question:	will this tester work with germanium transistors? also, does it report transistor leakage
Answer:	I haven't found a germanium transistor to test yet, but I have tested Ge small-signal diodes with mine, so I'm fairly certain this tester can properly identify and test Ge teansistors as well. If so, it will show the device type (PNP/NPN), ID the leads (BCE), and show the hfe (gain), but it will not show a leakage current value. The primary diference between Ge and Si devices is the difference in the voltage drop across a forward-biased junction. Ge junctions show a 0.3 - 0.4v drop, and Si junctions show 0.6 - 0.7v.
Question:	Can it be powered with a cable
Answer:	I did a simple mod in order to power it from a basic 9vdc power supply l. I simply installed a standard 12mm polarised jack into the case (theres a slot in the top center of the pcb to allow room) and use a currwnt limited wall wart or bench top piwer supply for the required 9 volts (solder the 2 wires from the jack to the battery terminal connections on the pcb matching polarity). Mine has worked a charm and no worries plus you have the option of using either power source. If you would like to know more on this mod reply and I will supply you with a more detailed step by step with photos.

Product description

1. Product Description

This Tester is a small tool design for Engineer, Electronic Maintenance and Factory.

It’s very easy to test plug-in and SMD devices, also can test different kinds of Diodes, Triodes, Thyristors, MOSFET; able to analysis the device type, the polarity of the pin, the output HFE, the valve voltage, the junction capacitance of the FET.



2. Attention

● Always be sure to discharge capacitors before connecting them to the Tester!

● If using DC supply, please choose DC 9V-12V adapter(including 9V and 12V).

● When the battery power is under 6V, please replace a new one.



3. Measuring Parameters

Resistor: 0Ω-50MΩ Resolution: 0.01Ω

Capacitor: 25pF-100mF Resolution: 1pF

Inductor: 0.01mH-20H Resolution: 0.01mH

Capacitor ESR: 2μF-50mF Resolution: 0.01Ω

(ESR: Equivalent Series Resistance)



Calibration

● Short T1,T2,T3 to one, then press button.

● When LCD shows “Selftest mode.. ?”, press button within 2 seconds to enter calibration mode, otherwise will come into transistor test mode.

● Tester automatic calibrating until LCD shows “isolate Probes!”, then separate T1,T2 and T3.

● Wait a few seconds until LCD shows “Test End”.

Package list:

ESR02 Pro multimeter

one pair of Agllicator clip test leads ( 1 red + 1 black 80cm );

Manual

• Automatic detection of NPN and PNP bipolar transistors, N- and PChannel MOSFETs, JFETs, diodes, double diodes, Thyristors and Triacs. ● Measuring of current amplification factor and Base-Emitter threshold voltage of bipolar transistors.
• Detection of the protection diode of bipolar transistors and MOSFETs. ● Measuring of the Gate threshold voltage and Gate capacity value of MOSFETs. ● The inductance measuring range is from 0.01mH to 20H, out of range or if the resistor higher than 2.1KΩ will be shown at resistor.
• Testing time is about two seconds, only capacity or inductance measurement can cause longer period. ● Small Devices Container is design for placing the small size components. ● The Probe socket support different kinds of probes.
• With a Typical ESR Value of Electrolytic Capacitor table on the cover, e- asy for user to judgment the detected capacitor's quality. The ESR table is for reference only, use the manufacturer's data as standard.
• Package list: ESR02 Pro multimeter, one pair of Agllicator clip test leads ,Manual

User questions & answers

Question:	How good are the test leads with regards to low r - good connection and durability? i've had esr meters with abysmal leads which "swivel
Answer:	Mine are about 0.1 ohms. Build quality is ok.
Question:	Can this in circuit test capacitor
Answer:	No

Product description

Features:

1. Support boot voltage detection function

2. Automatic detection of NPN and PNP transistors, N-channel and P-channel MOSFETs, diodes (including dual diodes), thyristors, triodes, resistors, and capacitors. Automatically testing the component leads and displaying them on the LCD

3. The forward bias voltage of the emitter transistor can be determined by detecting the amplification factor and base number of a transistor, a MOSFET protection diode, and the like

4. Measure gate threshold voltage and gate capacitance MOSFET

5. The display uses 12864 lcd LCD (128 * 64 characters)

6. High test speed, valid component test: In 2 seconds (except in larger capacitors, large capacitance measurement also takes a long time, the measurement time in 1 minute is normal)

7. One-button operation, power-on test.

8. Power Consumption Shutdown Mode: Less than 20 nA

9. Automatic shutdown function can avoid unnecessary waste, save battery energy and improve battery life.



Note:

Please make sure that capacitors are discharged before testing.

Battery is not included.

Please tear off the paper outside the case.



Specifications:

Material: PCB

Display: 128 x 64 LCD

Normal Testing Speed: 2 seconds

Shutdown Current: 20nA



Package included:

1 x Transistor Tester with case

• Test ranges:Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube, ESR, Resistance, Adjustable potentiometer
• Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage.
• High test speed, valid component test: 2 seconds (except in the larger capacitor of large capacitance measurement also takes a long time, the measured time of one minute is normal)
• 128*64 big Backlight LCD display,only 2mA when stand by.
• Auto power off function to avoid unnecessary waste, saving battery power, improved battery life

User questions & answers

Question:	how to test smd components with the tester
Answer:	As smd components are so small I don't think you could check them with this tester.
Question:	How do i make it read out the esr value when measuring capacitors
Answer:	It should show it automatically. Mine shows the 'capacitance', 'ESR' and 'Vloss'. Mine shows all 3 readings on the same screen. You have to plug component into holes (1 & 2) or (2 & 3) or (1 & 3).
Question:	Can it check jfets
Answer:	My tester is about a year old so I am sure the new ones have a newer software than mine but I dug out a few JFETs from my parts bin and put them to the test and it seems to check them ok.
Question:	What is the software version? I think it appears on the screen as it boots up
Answer:	I am sitting here looking at my unit and it does not show a software version when it is turned on. I got this one about 6 months ago. May be some changes and newer units may show the software version but mine don't.

Product description

Blue ESR Tester - Fully Assembled

User questions & answers

Question:	Can this be used to test capacitor ESR in circuit, or do you need to desolder and lift one lead
Answer:	It can be used to test in-circuit, made possible by using
Question:	I see it has an upper limit of 450volts. If you attempt to measure measure anything higher then 450v what happens? Does damage the meter? Not accurate
Answer:	The 450V refers to a test capacitor's voltage rating, not the voltage the unit can withstand. This unit can test capacitors in circuit, but must be fully discharged before testing or damage will occur to the meter.
Question:	does it consume alot of the battery power
Answer:	I purchased my esr meter about a year ago and have used it from time to time and have yet to replace the battery. My guess is that battery usage would be similar to that of a typical ohm meter. I am extremely happy with the purchase. It quickly determines the good or bad status of caps and would recommend its purchase. It will be worth the price the first time you diagnose a clean looking cap that is in fact internally damaged.
Question:	Does this come with a stand as I saw in a YouTube demo video
Answer:	No, the stand is an extra accessory you can buy.

Product description

Features:

1. Support boot voltage detection function

2. Automatic detection of NPN and PNP transistors, N-channel and P-channel MOSFETs, diodes (including dual diodes), thyristors, triodes, resistors, and capacitors. Automatically testing the component leads and displaying them on the LCD

3. The forward bias voltage of the emitter transistor can be determined by detecting the amplification factor and base number of a transistor, a MOSFET protection diode, and the like

4. Measure gate threshold voltage and gate capacitance MOSFET

5. The display uses 12864 lcd LCD (128 * 64 characters)

6. High test speed, valid component test: In 2 seconds (except in larger capacitors, large capacitance measurement also takes a long time, the measurement time in 1 minute is normal)

7. One-button operation, power-on test.

8. Power Consumption Shutdown Mode: Less than 20 nA

9. Automatic shutdown function can avoid unnecessary waste, save battery energy and improve battery life.

Note:

Please make sure that capacitors are discharged before testing.

Battery is not included.

Specifications:

Material: PCB

Display: 128 x 64 LCD

Normal Testing Speed: 2 seconds

Shutdown Current: 20nA

Package included:

1 x Transistor Tester with case

• ☀ Automatic detection of NPN and PNP transistors, n-channel and p-channel MOSFET, diode (including double diode), thyristor, transistor, resistor and capacitor and other components
• ☀ This mega 328 tester can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage
• ☀ Electronic component tester automaticly test the pin of a component, and display on the LCD
• ☀ Transistor tester measures the gate and gate capacitance of the MOSFET threshold voltage
• ☀lcr t4 uses 12864 liquid crystal display with green backlight