{"product_id":"fnirsi-dmt-99-digital-multimeter-9999-counts-trms-recording","title":"FNIRSI DMT-99 Digital Multimeter 9999 Counts TRMS - Recording","description":"\u003cp\u003eOur review of the FNIRSI DMT-99 finds it best suited to electronics hobbyists and technicians who need a compact, accurate meter with modern convenience. The single biggest reason to buy is the combination of \u003cstrong\u003e9999 counts TRMS accuracy\u003c\/strong\u003e and practical recording and monitoring modes that let users capture changing voltages or currents over time, making diagnosing intermittent faults much easier than with a basic multimeter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecording Mode:\u003c\/strong\u003e The meter can plot measured value ripple over time and store up to eight recorded readings so you can view fluctuations and Max\/Min values after a test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitoring Mode:\u003c\/strong\u003e Custom thresholds can be set and the meter issues an alert if readings go outside the defined range, helping catch transient problems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRechargeable Battery:\u003c\/strong\u003e Built-in 1500 mAh battery and Type-C charging eliminate disposable batteries and provide long runtime for field use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntelligent Auto-Ranging:\u003c\/strong\u003e Intelligent mode automatically identifies the measurement type and selects the optimal range for faster, no-guess testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor Display:\u003c\/strong\u003e A 2.4-in full-color TFT screen at 240x320 resolution makes readings clear in dim light and supports a customizable startup interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Function Set:\u003c\/strong\u003e The DMT-99 measures AC\/DC voltage and current, resistance, capacitance, continuity, diode checks, frequency, NCV and live wire detection, useful across repairs and troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe DMT-99 is aimed at electronics hobbyists, appliance and automotive DIYers, and technicians who value accurate TRMS readings and the ability to record or monitor signals over time. Its rechargeable battery and USB-C charging make it practical for frequent use away from a bench.\u003c\/p\u003e\n\u003cp\u003eUsers who only need occasional, very basic voltage checks or prefer the simplest single-function meters may find the feature set more than required; likewise, those needing laboratory-grade instrumentation with calibrated traceability should look to specialized test equipment instead.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-resolution \u003cstrong\u003e9999 counts TRMS\u003c\/strong\u003e measurement improves accuracy for non-sinusoidal signals.\u003c\/li\u003e\n\u003cli\u003eRecording and monitoring modes help identify intermittent issues that a static reading would miss.\u003c\/li\u003e\n\u003cli\u003eLong-lasting built-in 1500 mAh battery and convenient Type-C charging remove the need for disposable batteries.\u003c\/li\u003e\n\u003cli\u003eClear 2.4-in color display with DIY startup interface for personalized use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot a substitute for calibrated lab instruments where formal certification and traceability are required.\u003c\/li\u003e\n\u003cli\u003eAdvanced functions add complexity that may be unnecessary for users wanting a very simple meter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounts\u003c\/td\u003e\n\u003ctd\u003e9999 (TRMS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e2.4-in full-color TFT, 240x320\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBuilt-in 1500 mAh rechargeable, Type-C charging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Modes\u003c\/td\u003e\n\u003ctd\u003eAC\/DC voltage, AC\/DC current, resistance, capacitance, diode, continuity, frequency, NCV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecording\u003c\/td\u003e\n\u003ctd\u003e8 measured values, Max\/Min display, plotted ripple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eDual ceramic fuse protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe FNIRSI DMT-99 is a strong value for hobbyists and field technicians who need accurate \u003cstrong\u003eTRMS\u003c\/strong\u003e readings plus recording and monitoring features in a rechargeable package. It pairs practical runtime and USB-C charging with a clear color display, making it a versatile tool for troubleshooting intermittent electrical problems without the cost or complexity of lab equipment.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the meter recharge via USB-C?\u003c\/strong\u003e\u003cbr\u003eYes, it has a built-in 1500 mAh rechargeable battery and recharges using the Type-C port.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it record changing voltages over time?\u003c\/strong\u003e\u003cbr\u003eYes, the Recording Mode plots ripple and fluctuation over time and stores up to eight measured values with Max and Min shown.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this meter suitable for professional lab calibration?\u003c\/strong\u003e\u003cbr\u003eIt provides accurate TRMS readings for field and workshop use, but it is not intended as a certified calibrated lab instrument with traceable calibration documents.\u003c\/p\u003e","brand":"FNIRSI","offers":[{"title":"Default Title","offer_id":48674842607835,"sku":"B0CQRKR17W","price":42.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71jjLxiiGRL._SL1500.jpg?v=1778627437","url":"https:\/\/gearmusthave.com\/products\/fnirsi-dmt-99-digital-multimeter-9999-counts-trms-recording","provider":"GearMustHave","version":"1.0","type":"link"}