SparkFun TOL-10285 Analog Panel Meter – 0 to 5 VDC
This analog panel meter measures DC voltage from 0-5 volts with 2.5% accuracy. It has a clear and easy to read scale and an adjustable dial. These come in handy for measuring the output of sensors with 5V ranges.
The face of the meter is 45x45mm overall. The mounting hole should be 38mm. The overall depth of the meter is 35mm.