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Signstek MESR-100 V2 Auto Ranging in Circuit ESR Meter Capacitor Tester/Low Ohm Meter Up to 0.01 to 100R, Support in Measuring Capacitance Resistance Circuit

Signstek MESR-100 V2 Auto Ranging in Circuit ESR Meter Capacitor Tester/Low Ohm Meter Up to 0.01 to 100R, Support in Measuring Capacitance Resistance Circuit

Q: Is there a way to confirm it's v2 with sine wave and not v1?

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.

Q: can this meter perform a leak test on motor start capacitors?

No. This meter is for one test only - ESR of a capacitor. It does not perform any other tests.

Q: Values in 35v and higher columns decrease as you go down, columns for 10,16,25v decrease, then go back up. is this a typo? hint: look for ".12"

Better to use on of the ESR charts you can find online, not the one printed on the case (whether it's right or wrong)

Q: what is better about v2 (version 2) of this MESR-100 meter for the extra $10 it costs over the original version?

Compare MESR100 old V1 and new V2 Improvement: For an extra $10 I would get version 2 which is what I have now. 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 more 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.

4.4/5

Product ID: 355682688

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Details

Brand
Signstek
Power Source
Battery
Style
Impedance
Colour
Black
Item Weight
0.5 Pounds

⚡0.01 to 100Ω ultra-wide range

🔋Low 15mV test voltage for safe in-circuit use

⏱️Auto-ranging in under 2 seconds

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Description

🔧 Diagnose like a pro—never miss a faulty capacitor again!

DUAL TERMINAL DESIGN - Quickly inspect capacitors and resistors with easy-to-use dual probes and a handy printed ESR reference table.
COMPACT LIGHTWEIGHT - Weighing just 227g, this sleek black meter fits perfectly in your professional toolkit for on-the-go troubleshooting.
PRECISION MEETS SPEED - Auto-ranging ESR and low ohm readings in just 0.3-2 seconds—no more waiting around.
TRUE 100 K HZ SQUARE WAVE MEASUREMENT - Industry-grade accuracy matching capacitor manufacturers’ methods for reliable ESR values.
IN CIRCUIT TESTING NO CIRCUIT DAMAGE - Ultra-low 15mV test voltage ensures safe diagnostics without powering semiconductors.

The Signstek MESR-100 V2 is a battery-powered, auto-ranging ESR and low ohm meter designed for precise in-circuit testing of capacitors and resistors. Utilizing a true 100kHz square wave, it delivers accurate ESR measurements from 0.01 to 100Ω with minimal test voltage (15mV), ensuring safe diagnostics without activating circuit components. Its dual terminal design and quick refresh times (0.3-2 seconds) make it an essential tool for professional electronics repair and maintenance.

Specifications

Brand	Signstek
Power Source	Battery Powered
Style	Impedance
Colour	Black
Item Weight	227 g
Min. Operating Voltage	15 Millivolts
Specification Met	CE
Measurement Type	Ohmmeter, LCR Meter
Maximum Operating Voltage	5 Volts
UPC	710219731090
Manufacturer	Signstek
Model number	US-171024-02
Number of Memory Sticks	1
Package Dimensions	16.61 x 9.4 x 4.9 cm; 226.8 g
Item model number	US-171024-02
Are batteries included?	No

Have a Question? See What Others Asked

Is there a way to confirm it's v2 with sine wave and not v1?

can this meter perform a leak test on motor start capacitors?

Values in 35v and higher columns decrease as you go down, columns for 10,16,25v decrease, then go back up. is this a typo? hint: look for ".12"

what is better about v2 (version 2) of this MESR-100 meter for the extra $10 it costs over the original version?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

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3450 DH

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Moroccostore

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