Tinker & Rasor Model CPV-4 Cathodic Protection Voltmeter is a revolutionary instrument for measuring DC structure-to-earth potentials of various buried or submerged metallic objects. Powered by an ordinary 9-volt battery, the Model CPV-4 gives an immediate reading in large ½...
This is a 0.36" LED display mini 30V DC digital volt meter panel in Red Color. This voltmeter can read voltages ranging from 5 volts to 30 volts. It is simple to use and a great replacement for old, difficult-to-read analog panel meters in projects....