{"product_id":"signstek-mesr-100-v2-esr-meter-capacitor-tester-in-circuit-esr-check","title":"Signstek MESR-100 V2 ESR Meter Capacitor Tester - In-Circuit ESR Check","description":"\u003cp\u003eIn this review of the Signstek MESR-100 V2, the bottom line is clear: this compact in-circuit ESR meter is aimed at hobbyists, technicians and repairers who need a fast, inexpensive way to identify bad capacitors and check low resistance on boards. The unit's standout feature is its \u003cstrong\u003eauto-ranging ESR and low ohm measurement\u003c\/strong\u003e, which simplifies on-board tests without removing components. It is not a laboratory-grade instrument, but it delivers practical diagnostics, a printed ESR reference and a quick workflow for troubleshooting amplifiers, power supplies and general electronics repairs.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eDual terminal design:\u003c\/strong\u003e lets a user clamp or probe a component quickly for fast in-circuit inspection without complex setup.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAuto-ranging ESR:\u003c\/strong\u003e automatically selects the correct measurement range so users can focus on diagnosing components instead of adjusting settings.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWide measurement range:\u003c\/strong\u003e covers low ohm values up to 100R so it handles both ESR checks and basic resistance tests in circuits.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePrinted ESR table:\u003c\/strong\u003e built-in reference speeds evaluation by matching measured ESR against typical capacitor size expectations.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFast capacitor\/resistor checks:\u003c\/strong\u003e designed for rapid screening of multiple components during repair sessions, saving time over full desolder and bench tests.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Signstek MESR-100 V2 suits electronics hobbyists, entry-level technicians and home repairers who need a portable, affordable tool for spotting failed electrolytic capacitors and verifying low resistance links on PCBs. Its simplicity and printed reference make it practical for bench repair of audio gear, power supplies and consumer electronics.\u003c\/p\u003e\n\u003cp\u003eThose needing laboratory precision, calibrated measurements for professional service centers, or long probe leads for awkward component locations should look elsewhere; some users report mixed accuracy and the short lead length can limit reach on larger chassis or tightly packed boards.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eClear benefit for quick in-circuit \u003cstrong\u003ecapacitor detection\u003c\/strong\u003e and basic resistance checks without desoldering.\u003c\/li\u003e\n \u003cli\u003eAuto-ranging function reduces setup time and user error during routine diagnostics.\u003c\/li\u003e\n \u003cli\u003ePrinted ESR table and dual terminals improve workflow for repetitive checks and comparisons.\u003c\/li\u003e\n \u003cli\u003eGood value for money for hobby and light professional use, helping save repair costs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSome users report \u003cstrong\u003emixed accuracy\u003c\/strong\u003e and occasional inconsistent readings compared with precision bench meters.\u003c\/li\u003e\n \u003cli\u003eLead length is short, which can make probing components in large enclosures or tight spaces awkward.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eMESR-100 V2 ESR Meter Capacitor Tester\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMeasurement types\u003c\/td\u003e\n\u003ctd\u003eESR (in-circuit) and low resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eWide measurement range up to 100R\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eAuto-ranging capacitor ESR and low ohm meter\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTerminals\u003c\/td\u003e\n\u003ctd\u003eDual terminal for fast inspection\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eIncluded reference\u003c\/td\u003e\n\u003ctd\u003ePrinted ESR table for quick checks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Signstek MESR-100 V2 is a practical, affordable diagnostic tool for anyone who needs to screen capacitors and check low resistance on boards quickly. It offers useful features like \u003cstrong\u003eauto-ranging\u003c\/strong\u003e and a printed ESR table that speed routine repairs, though users seeking precision lab measurement or longer leads should consider higher-end alternatives. For hobbyists and small repair tasks it represents solid value and convenience.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this meter test capacitors in-circuit?\u003c\/strong\u003e\u003cbr\u003eYes, the MESR-100 V2 is designed for in-circuit ESR checks so many capacitors can be evaluated without desoldering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it require manual range selection?\u003c\/strong\u003e\u003cbr\u003eNo, the unit uses \u003cstrong\u003eauto-ranging\u003c\/strong\u003e for ESR and low ohm measurements to simplify use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the leads long enough for all repairs?\u003c\/strong\u003e\u003cbr\u003eLeads are short and some users find the length limiting for large enclosures or hard-to-reach components; using external long probes may help.\u003c\/p\u003e","brand":"Signstek","offers":[{"title":"Default Title","offer_id":48254349803739,"sku":"B00GYSFOM6","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61FX0d2LhSL._SL1500.jpg?v=1778300542","url":"https:\/\/gearmusthave.com\/products\/signstek-mesr-100-v2-esr-meter-capacitor-tester-in-circuit-esr-check","provider":"GearMustHave","version":"1.0","type":"link"}