The AEMC True RMS Clamp-On Meter 203 is safety rated at 600V CAT IV. It measures AC + DC volts and amps, frequency, continuity, resistance and can also perform diode checks. An Adapter mode allows external sensor inputs to be displayed. The 203 (#2139.12) includes temperature measurement and is supplied with a K thermocouple probe. A Delta relative function allows new measurements to be compared to a reference value and a MIN/MAX function keeps track of these high and low values.