--- product_id: 4478349 title: "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" brand: "signstek" price: "KD 28.39" currency: KWD in_stock: true reviews_count: 9 category: "Signstek" url: https://www.desertcart.com.kw/products/4478349-mesr-100-v2-auto-ranging-in-circuit-esr-meter-capacitor store_origin: KW region: Kuwait --- # 0.01 to 100Ω low ohm range Auto-ranging for precise ESR & capacitance Battery powered, portable 8oz design 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 **Brand:** signstek **Price:** KD 28.39 **Availability:** ✅ In Stock ## Summary > ⚡ Diagnose like a pro — never replace a capacitor blindly again! ## Quick Answers - **What is this?** 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 by signstek - **How much does it cost?** KD 28.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/4478349-mesr-100-v2-auto-ranging-in-circuit-esr-meter-capacitor) ## 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 - • **Compact & Portable:** Lightweight 8oz design fits perfectly in your professional toolkit - • **Auto-Ranging Precision:** Smart auto-range feature stabilizes readings for reliable results - • **Wide Measurement Spectrum:** Accurately measures ESR and resistance from 0.01 to 100Ω - • **User-Friendly ESR Reference:** Built-in printed ESR table for instant, on-the-spot capacitor evaluation - • **In-Circuit ESR Testing Made Effortless:** Quickly diagnose capacitor health without desoldering ## Overview The Signstek MESR-100 V2 is a professional-grade, battery-powered ESR and low ohm meter designed for fast, in-circuit capacitor and resistor testing. Featuring auto-ranging capability and a wide measurement range from 0.01 to 100Ω, it delivers reliable, repeatable results without the need to desolder components. Its compact 8oz form factor and built-in ESR reference table make it an indispensable tool for electronics repair professionals seeking efficiency and accuracy. ## Description Product description Advantage of V2 Specification Parameter Package List Review: This is a great tool for troubleshooting and saves me a lot of ... - 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: A Tool That Actually Tells Me Which Caps Are Bad (Without Guessing) - What Makes It So Useful (For Real Work) The biggest win for me is in-circuit ESR testing. I don’t have to desolder every capacitor just to check if it’s bad. I can probe directly on the board and get a solid answer in seconds. That alone saves a ton of time. It uses a ~100kHz test signal, which is important because it matches how capacitor ESR is actually measured in real applications . Why I Trust It More Than a Multimeter A regular multimeter might tell me capacitance—but that doesn’t tell the full story. This meter shows ESR (internal resistance), which is usually what actually fails in caps over time. Low ESR → good cap High ESR → bad cap (even if capacitance looks fine) That’s huge when troubleshooting unstable power supplies. Where It Helped Me Most I’ve used it for: Xbox PSU repairs (huge here) Motherboards and GPUs Old TVs / monitors Random SMPS boards It’s especially useful when I’m chasing intermittent issues or unstable voltage rails. Fast, Simple, and Repeatable No menus, no complicated setup: Touch probes → instant reading Auto-ranging handles everything Built-in ESR chart helps quick comparison It measures roughly 0.01–100Ω, which covers most real-world capacitor failures ## Features - Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check - Wide Measurement Range - Auto-ranging capacitor ESR and Low Ohm Meter ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00GYSFOM6 | | Best Sellers Rank | #29,810 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Capacitance Meters | | Brand | Signstek | | Brand Name | Signstek | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 717 Reviews | | Item Weight | 0.5 Pounds | | Manufacturer | Signstek | | Measurement Type | LCR Meter | | Min. Operating Voltage | 15 Millivolts | | Minimum Operating Voltage | 15 Millivolts | | Model | US-171024-02 | | Part Number | US-171024-02 | | Power Source | Battery Powered | | Style | Circuit Testers | | Style Name | Circuit Testers | | UPC | 710219731090 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Signstek - **Color:** Black - **Item Weight:** 0.5 Pounds - **Power Source:** Battery Powered - **Style:** Circuit Testers ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/61i9HAWQHGL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/51VZ+3CX3KL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/516vYOun6ML.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/619Q6gunaHL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/61xMwnmd6-L.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 ### ⭐⭐⭐⭐⭐ This is a great tool for troubleshooting and saves me a lot of ... *by G***R on February 11, 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. ### ⭐⭐⭐⭐⭐ A Tool That Actually Tells Me Which Caps Are Bad (Without Guessing) *by J***. on April 29, 2026* What Makes It So Useful (For Real Work) The biggest win for me is in-circuit ESR testing. I don’t have to desolder every capacitor just to check if it’s bad. I can probe directly on the board and get a solid answer in seconds. That alone saves a ton of time. It uses a ~100kHz test signal, which is important because it matches how capacitor ESR is actually measured in real applications . Why I Trust It More Than a Multimeter A regular multimeter might tell me capacitance—but that doesn’t tell the full story. This meter shows ESR (internal resistance), which is usually what actually fails in caps over time. Low ESR → good cap High ESR → bad cap (even if capacitance looks fine) That’s huge when troubleshooting unstable power supplies. Where It Helped Me Most I’ve used it for: Xbox PSU repairs (huge here) Motherboards and GPUs Old TVs / monitors Random SMPS boards It’s especially useful when I’m chasing intermittent issues or unstable voltage rails. Fast, Simple, and Repeatable No menus, no complicated setup: Touch probes → instant reading Auto-ranging handles everything Built-in ESR chart helps quick comparison It measures roughly 0.01–100Ω, which covers most real-world capacitor failures ### ⭐⭐⭐⭐ excellent, but leads too short *by W***I on January 20, 2026* Works well to identify defective capacitors. As many people have said, the leads are not just too short, they are tied to close to one another. The leads need another 4" and the separation needs to be another 2" to be able to get to awkward connections. ## Frequently Bought Together - 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 - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components - YIHUA 929D-V Electric Desoldering Soldering Iron Solder Sucker Desoldering Pump with Shorter Charging Handle and Desoldering Nozzles 1.0mm 1.2mm for Through-Hole Desoldering --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/4478349-mesr-100-v2-auto-ranging-in-circuit-esr-meter-capacitor](https://www.desertcart.com.kw/products/4478349-mesr-100-v2-auto-ranging-in-circuit-esr-meter-capacitor) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-23*