SC440 – 400A Clamp Meter Dual Display | InrushFieldpiece SC440 400A Clamp Meter Dual Display Inrush True RMS Clamp Meter with Temperature, Inrush Current, Capacitance and Backlight All in one HVACR meter model SC440. The mid size essential clamp meter has virtually every parameter for electrical and thermal HVACR testing in one meter. This auto and manual ranger includes a host of safety features including a high voltage LED and beeper, a continuity warning, push button non contact voltage (NCV),