The SC420 is an essential meter for HVACR professionals. It's an auto or manual ranging clamp meter that includes the electrical ranges students and technicians use for most HVACR work, plus temperature, capacitance and duty cycle - all for a great price. The SC-420 also has several safety features like a high-voltage LED and beeper, a continuity warning, push button non-contact voltage (NCV), a lead holder on the clamp, and MAX hold so you can concentrate on the test point, hook up, and see the results after you’ve disconnected.