The True RMS Clamp-On Meter Model 203 is safety rated at 600V CAT IV. It measures AC+DC volts and amps, frequency, continuity, resistance, and temperature (with the supplied K thermocouple probe). The Model 203 can also perform diode checks. Its Adapter mode displays external sensor inputs. The Delta relative function compares new measurements to a reference value, and the MIN/MAX function tracks high and low values. This compact and rugged meter can operate in the most demanding work environments, and its IP40 rating allows it to withstand both dust and water spray.