The Fieldpiece SC44 600V Mini Clamp Meter for HVAC/R is a basic, affordable clamp-on meter designed for HVAC/R field service. The Fieldpiece SC-44 measures Amps AC, Volts AC, Volts DC, resistance, continuity, and includes a diode check. A built-in Non-Contact Voltage (NCV) sensor allows you to test thermostats and circuits to see if the thermostat is hot or not. The Fieldpiece SC44's range button (Looks like a two ring bulls eye) switches the Fieldpiece SC44 between a manual ranging meter and an auto ranger. The small size of the SC44 fits easily in your hand. Keep it in glove box as a backup meter or hang it on your belt to take measurements in tight places. The Fieldpiece SC44 Mini Clamp Meter is ratedfor HVAC/R at Cat.III 600V.