20pcs 0.28 Inch Two-wire 2.5-30V Digital Blue Display DC Voltmeter Adjustable Voltage Meter

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 range	Two-wire DC2.50~32.0V / three-wire DC0-100V / 500V
Power supply range	No need to supply power separately. The measured voltage <40V, higher than 40V may be damaged.
Test accuracy	&pm;1%. >10V error &pm;0.1V; <10V &pm;0.03V
Input resistance	>50K
Working current	<30mA
Refresh rate	About 100mS once
Display specification	Three digit 0.28 LED digital tubes
Lead length	Default 20cm
Dimensions	30 x 11.5 x 9 mm
Hole Size	Pitch: 26mm Aperture: 2.4mm
Net weight	4g
Operating temperature	-10 to +80 ﾣC
Working humidity	10 to 80%
Working pressure	80 to 106 kPa

Package includes:

20 x Voltage meter