---
product_id: 316491826
title: "MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing"
brand: "signstek"
price: "€ 172.24"
currency: EUR
in_stock: true
reviews_count: 5
category: "Signstek"
url: https://www.desertcart.hr/products/316491826-mesr-100-v2-auto-ranging-in-circuit-esr-lcr-meter
store_origin: HR
region: Croatia
---

# 100kHz sine wave test signal 0.001Ω high resolution 80+ hours battery life MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing

**Brand:** signstek
**Price:** € 172.24
**Availability:** ✅ In Stock

## Summary

> ⚡ Diagnose like a pro — never miss a bad cap again!

## Quick Answers

- **What is this?** MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing by signstek
- **How much does it cost?** € 172.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/316491826-mesr-100-v2-auto-ranging-in-circuit-esr-lcr-meter)

## Best For

- signstek enthusiasts

## Why This Product

- Trusted signstek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Visual Clarity On Demand:** 128x64 dot matrix LCD displays clear numeric values plus embedded 25V capacitor health reference.
- • **Ergonomic & Ready to Work:** Curved plastic case with a 60° desk stand designed for comfortable, hands-free operation.
- • **Power Your Workflow Anywhere:** Runs on 2 AA batteries or USB power for extended, flexible field use without downtime.
- • **Precision Meets Practicality:** Auto-ranging ESR measurement with 0.001Ω resolution for pinpoint capacitor health insights.
- • **In-Circuit Testing, No Hassle:** Low-voltage (<15mV) testing lets you diagnose capacitors without desoldering or powering semiconductors.

## Overview

The Signstek MESR-100 V2 is a professional-grade ESR LCR meter designed for in-circuit capacitor testing using a 100kHz sine wave signal. It offers ultra-high resolution down to 0.001Ω, a large dot matrix LCD with embedded capacitor health references, and flexible power options including AA batteries and USB. Ideal for electronics repair professionals, it enables fast, accurate diagnosis of capacitor condition without desoldering, saving time and reducing guesswork.

## Description

Using 100kHz to remove the impedance 1/(2*pi*F*C), the impedance will become small, and then we can measure the true series resistor value. A bad E-capacitor have larger ESR and create large ripple rather than filtering noise. Normally, a big capacitor is larger than 3 ohm. Therefore, we can measure the capacitor is bad, damaged or in good condition by using this theory. Because 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. Because this low testing voltage, it cannot turn on the semiconductor inside a circuit under testing. During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not. 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. Specification: 1)Accuracy: Up to 1% (detail on above table) 2) High Resolution: 4 digit, or 0.001Ohm @ 1 Ohm range 3)Measuring voltage: 80 Hours Package 1x MESR-100 V2 2 x test clips

Review: I do electronics repair as a second job. This is a great tool for troubleshooting and saves me a lot of time. Bad capacitors are a frequent problem but they are difficult to test and I don't have the time to just replace every capacitor I run across on finicky equipment. PROs: Tests capacitors better than a multimeter without having to desolder them. Posts the results in plain English as well as the numeric readings. It's reliable. I have tested quite a few capacitors so far and the results so far are accurate and repeatable. It's inexpensive. I shopped around for a quality ESR and found that units typically cost more than this, have to ship from China or Russia, and frequently don't have as many features. CONSs: The battery door is difficult to get to. The stand is in the way. It's a minor hassle. I plan to just remove the stand entirely as I do not use it. It's not extremely precise, particularly on small capacitors. Caps below a certain point you have to look up on a table (which is handily printed on the unit). The numbers can vary a little but not enough to make a difference for what I'm testing. All I want to know is the answer to one question: "Is this a good cap?" It's precise enough to be accurate in answering this question and that is all I care about.
Review: Love this thing, but the leads slip around when trying to clamp them and they are very short they should be longer and have the ability to put tiny probes on as well!!

## Features

- manufacturer: Signstek
- Item Trademark: SIGNSTEK
- Item Category: Electric Circuit Testing Device

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00GYSFOM6 |
| ASIN  | B00GYSFOM6 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #79,654 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #9 in Ohmmeters |
| Color | black |
| Customer Reviews | 4.4 4.4 out of 5 stars (667) |
| Customer reviews | 4.4 4.4 out of 5 stars (667) |
| Date First Available | 4 March 2015 |
| Date First Available  | 4 March 2015 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 227 g |
| Item model number | US-171024-02 |
| Item model number  | US-171024-02 |
| Manufacturer | Signstek |
| Manufacturer  | Signstek |
| Package Dimensions | 16.89 x 9.5 x 4.9 cm; 226.8 g |
| Package Dimensions  | 16.89 x 9.5 x 4.9 cm; 226.8 g |
| Part number | US-171024-02 |
| Power source type | Battery Powered |
| Style | Modern |

## Product Details

- **Brand:** Signstek
- **Colour:** black
- **Item weight:** 0.5 Pounds
- **Power source:** Battery Powered
- **Style:** Modern

## Images

![MESR-100 V2 Auto Ranging in Circuit ESR LCR Meter Capacitor/Low Ohm Meter Up to 0.01 to 100R, Support in Circuit Testing - Image 1](https://m.media-amazon.com/images/I/61i9HAWQHGL.jpg)

## Questions & Answers

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***R on 11 February 2015*

I do electronics repair as a second job. This is a great tool for troubleshooting and saves me a lot of time. Bad capacitors are a frequent problem but they are difficult to test and I don't have the time to just replace every capacitor I run across on finicky equipment. PROs: Tests capacitors better than a multimeter without having to desolder them. Posts the results in plain English as well as the numeric readings. It's reliable. I have tested quite a few capacitors so far and the results so far are accurate and repeatable. It's inexpensive. I shopped around for a quality ESR and found that units typically cost more than this, have to ship from China or Russia, and frequently don't have as many features. CONSs: The battery door is difficult to get to. The stand is in the way. It's a minor hassle. I plan to just remove the stand entirely as I do not use it. It's not extremely precise, particularly on small capacitors. Caps below a certain point you have to look up on a table (which is handily printed on the unit). The numbers can vary a little but not enough to make a difference for what I'm testing. All I want to know is the answer to one question: "Is this a good cap?" It's precise enough to be accurate in answering this question and that is all I care about.

### ⭐⭐⭐⭐⭐ Review
*by T***T on 9 February 2020*

Love this thing, but the leads slip around when trying to clamp them and they are very short they should be longer and have the ability to put tiny probes on as well!!

### ⭐⭐⭐⭐⭐ Review
*by R***. on 3 October 2024*

I have used this meter now to test over 500 capacitors and it has performed flawlessly. The only situation I would advise users of is not to relay only on the auto-ranging capability of the meter. Auto-range works great but for some capacitors the ESR is close to the limit of two ranges and the meter will jump back and forth trying to resolve the resistance. If this occurs simply press the mode range button once or twice until the reading stabilizes. This meter can be used for in-circuit testing of capacitors as well but so far I have not needed it for that.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-09*