Amprobe’s AM-270 is a commercial, true-rms multimeter for electrical and HVAC applications and is dedicated to electrical and HVAC professionals. Safety rated to CAT IV 600 V and CAT III 1000 V for outdoor and indoor applications requiring direct connection to main panel of the building or measurement of the outdoor wiring connecting building the utility transformer. This true-rms multimeter measures complete range of electrical parameters including voltage, current, resistance and frequency. It also covers HVAC application with temperature, capacitance and micro amps functions. True-rms sensing for superior accuracy.