10pcs 0.28 Inch Two-wire 2.5-30V Digital Red Display DC …, Perth

Feature 1 The wiring of this voltmeter is simple The conventional two wires are used the red is connected to the positive the black is connected to the negative and the reverse connection is protected 2 Conventionally no external working power supply is required and the measuring voltage can be directly operated The measuring voltage range is two wire 2 50 30V three wire 100V 3 Wide voltage operation red 2 50V low and safe pressure up to 40V more than 40V may be damaged 4 When measuring voltages below 10V two digits are displayed after the decimal point when measuring voltages above 10V one digit is displayed after the decimal point Measuring rangeTwo wire DC2 50 32 0VPower supply rangeNo need to supply power separately The measured voltage 40V higher than 40V may be damaged Test accuracy±1 10V error ±0 1V 10V ±0 03VInput resistance50KΩWorking current30mARefresh rateAbout 100mS onceDisplay specificationThree digit 0 28 LED digital tubesLead lengthDefault 20cmDimensions30 x 11 5 x 9 mmHole SizePitch 26mm Aperture 2 4mmNet weight4gOperating temperature 10 to 80 °CWorking humidity10 to 80 Working pressure80 to 106 kPaPackage includes 10 x Voltage meter