"VAISHNO CFG" Make analog ammeter and voltmeter having a standard of IEC-60414 and of IP-52 degree of protection. This is our most common panel accessories having a dimension of 96X96 mm measuring devices that are designed for flush-mounted installation on doors, wicket doors and front plates of enclosures and cubicles. Analog Ammeter: The ammeters measure in amps the current flowing through an electrical circuit. Analog voltmeter: The voltmeter measures in volts the potential difference of an electrical circuit.