{"product_id":"0-28-led-digital-voltmeter-dc-0-100v-panel-gauge-3-wire-mini","title":"0.28\" LED Digital Voltmeter DC 0–100V Panel Gauge | 3-Wire Mini Voltage Meter | Red Blue Green Yellow","description":"\u003ch2\u003e0.28\" LED Digital Voltmeter — DC 0–100V Panel Gauge, 3-Wire Mini Voltage Meter\u003c\/h2\u003e\n\n\u003cp\u003eA compact, bright LED panel voltmeter for monitoring DC voltage in car dashboards, battery systems, power supplies, and DIY electronics projects. The \u003cstrong\u003e0.28\" LED digital display\u003c\/strong\u003e provides a clear, high-contrast voltage readout from 0 to 100V DC with ±1% accuracy — readable in both bright sunlight and low-light conditions. The ultra-compact 33 × 11.5 × 9mm body fits a standard 23 × 10mm panel cutout, making it ideal for integration into instrument panels, enclosures, and custom builds. Available in red, blue, green, and yellow LED display colours.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.28\" LED digital tube (3-digit)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasuring Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 0–100V (3-wire connection)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 4–40V (separate power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±1% (\u0026gt;10V) \/ ±0.2V (\u0026lt;10V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50kΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;30mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRefresh Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~100ms\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15cm (default)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBody Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e33 × 11.5 × 9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePanel Cutout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 × 10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-10°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Colours\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed \/ Blue \/ Green \/ Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e3-Wire Connection Guide\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eWire\u003c\/th\u003e\n\u003cth\u003eFunction\u003c\/th\u003e\n\u003cth\u003eConnect To\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower supply positive (VCC)\u003c\/td\u003e\n\u003ctd\u003eDC 4–40V power source positive\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlack\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower supply negative (GND)\u003c\/td\u003e\n\u003ctd\u003eCommon ground\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYellow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVoltage measurement input\u003c\/td\u003e\n\u003ctd\u003eVoltage to be measured (0–100V)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: The working voltage (red\/black) and the measured voltage (yellow) can be from different sources. The working voltage must be 4–40V DC. Do NOT exceed 40V on the working voltage terminals — this may damage the meter.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e0–100V DC measurement range\u003c\/strong\u003e — covers 12V, 24V, 36V, 48V, and 72V battery and power systems\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e±1% accuracy\u003c\/strong\u003e — reliable voltage monitoring for battery state-of-charge and power supply verification\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUltra-compact 33 × 11.5 × 9mm\u003c\/strong\u003e — fits in tight panel spaces and custom enclosures\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e23 × 10mm panel cutout\u003c\/strong\u003e — standard size for easy panel integration\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e4 display colour options\u003c\/strong\u003e — red, blue, green, yellow to match your panel design or colour-code by function\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e100ms refresh rate\u003c\/strong\u003e — fast enough to track voltage changes in real time\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eReverse connection protection\u003c\/strong\u003e — protected against accidental reverse polarity on the working voltage input\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e\u0026lt;30mA working current\u003c\/strong\u003e — minimal power draw, suitable for battery-powered applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCar and motorcycle battery voltage monitoring (12V \/ 24V)\u003c\/li\u003e\n  \u003cli\u003eElectric vehicle (EV) and e-bike battery pack monitoring (36V \/ 48V \/ 72V)\u003c\/li\u003e\n  \u003cli\u003eDIY bench power supply voltage display\u003c\/li\u003e\n  \u003cli\u003eSolar charge controller battery voltage monitoring\u003c\/li\u003e\n  \u003cli\u003eLiPo and Li-ion battery pack state-of-charge indicator\u003c\/li\u003e\n  \u003cli\u003eUPS and backup power system voltage monitoring\u003c\/li\u003e\n  \u003cli\u003eCNC machine and 3D printer power supply monitoring\u003c\/li\u003e\n  \u003cli\u003eCustom instrument panel and dashboard builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I measure AC voltage with this meter?\u003c\/strong\u003e\u003cbr\u003eA: No. This meter measures DC voltage only (0–100V DC). For AC voltage measurement, a dedicated AC voltmeter is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can the working voltage and measured voltage be the same source?\u003c\/strong\u003e\u003cbr\u003eA: Yes, for voltages between 4V and 40V, you can connect the working voltage (red\/black) and measurement input (yellow) to the same source. For voltages above 40V (e.g., 48V, 72V), use a separate 4–40V power source for the working voltage terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I mount this in a panel?\u003c\/strong\u003e\u003cbr\u003eA: Cut a 23 × 10mm rectangular hole in your panel. Insert the meter from the front and secure with the included mounting clips or adhesive. Connect the three wires to the appropriate terminals.\u003c\/p\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 0.28\" LED Digital Voltmeter DC 0–100V (display colour as selected)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"RED \/ CHINA","offer_id":46978927460587,"sku":"14:10#RED;200007763:201336100","price":8.48,"currency_code":"USD","in_stock":true},{"title":"BLUE \/ CHINA","offer_id":46978927493355,"sku":"14:173#BLUE;200007763:201336100","price":8.48,"currency_code":"USD","in_stock":true},{"title":"GREEN \/ CHINA","offer_id":46978927526123,"sku":"14:175#GREEN;200007763:201336100","price":8.48,"currency_code":"USD","in_stock":true},{"title":"YELLOW \/ CHINA","offer_id":46978927558891,"sku":"14:366#YELLOW;200007763:201336100","price":8.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/0-28-inch-led-digital-voltmeter-0-100v-dc-panel-mini-car-diy.webp?v=1761026397","url":"https:\/\/keszoox.com\/products\/0-28-led-digital-voltmeter-dc-0-100v-panel-gauge-3-wire-mini","provider":"Keszoox","version":"1.0","type":"link"}