Esr Meter MESR100 v2 Hands on look at a low priced Equivalent series resistance meter.

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In this video we will have a look at the MESR100 esr meter from MIB Instruments,We will have a look at the insides and test some components.

For the price as an entry level esr meter i would recommend it the test leeds a bit short for in circuit testing But its a great little meter.


JINGYAN 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.

What is ESR of capacitor?

There is a series resistor inside a capacitor, by using 100kHz to remove the impedance 1/(2*pi*F*C), the impedance will become small, and we can then measure the true series resistor value.

A bad E-capacitor will have a larger ESR and create a large ripple rather than filtering noise. Normally, a bad capacitor is larger than 3 ohm.

Using this theory, we can measure to see if the capacitor is bad/ damaged or in good condition.

Because this ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result it can be use as an in circuit tester as the low testing voltage will not turn on the semiconductor inside a circuit under test.


1) Accuracy: Up to 1%

Wide Measurement Range: 1uF (for 0.1uF the error will be larger on equation 1/(2*pi*F*C) @ 100Khz )

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 current 0.02A

8) Battery Life time: 80 Hours

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Post time: 06-20-2017