ขาย โวลต์มิเตอร์โวลต์มิเตอร์ LED 70-500V ราคาที่ดีที่สุด

Welcome to Warmheart, I am very happy to serve you. Description: This voltmeter's wiring is simple, it only need to connect two wires, the red wire is to connected to positive pole, the black wire is to connected to negative pole. There is protection when the wires aren't correctly connected, the electric circuit won't be bummed.It has reverse connect protection. This voltmeter doesn't need external drive working power, it can work with measuring voltage, the working voltage's range is 70-500V. Good stability and high measurement accuracy. With trimmer potentiometer. Easy to read, install and use. No need external power supply. Specification: Item Name: Digital Voltmeter Measuring Range: AC 70V - 500V Power Supply Range: AC 70V - 500V(No additional power supply needed, direct use the measured voltage as a power supply.) Maximum Input: AC 500V(Note: Input voltage higher than 500V may be permanently damaged!) Allowable Error: ±1% Input Impedance: >1MΩ Working Current: Red: <23mA, Green: <18mA, Blue: <17mA Refresh Speed: About 300mS/time Display Mode: Three-digit "0.56" LED Digital Tube Display Color: Red, Green, Blue (Optional) Lead-cable Length: 20cm/7.87" (Approx.) Operating Temperature: -20℃ - 65℃ Size: 4.7cm x 2.9cm x 2.1cm/1.85" x 1.14" x 0.83" (Approx.) Package Included:1 x Digital Voltmeter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.