Blue LED Panel Mount Voltmeter 

Simple and easy to use Voltmeter

This voltmeter does not require a power and sensor wiring. Simply connects to the DC voltage source that you want to monitor via Red (positive) and Black (negative ground) wiring. 

The display has a microcontroller that will read the voltage, compare it to a stable reference and display the voltage with 0.1V precision on a 3-digit 0.56" tall 7-segment display. It works from 4.5V up to 30V and is reverse-polarity protected so it will be good for nearly any electronic project! The meter draws 3-4mA to power the microcontroller and display. This particular LED display is a nice vivid blue, which we found very readable. To mount to your enclosure, simply cut a 45.5mm × 26.5mm rectangle and snap it in.

TECHNICAL DETAILS

Dimensions: 48x29x21mm
Panel cutout: 45.5mm x 26.5mm
Digit size: 14mm/0.56" high, blue LEDs
Refresh rate: about 2 Hz
Power specifications:

4.5V to 30V DC measurements
0.1V precision
10-15mA draw
Blue LED display
Reverse polarity protected