Extech EX330-NIST- is a digital multimeter that can test for AC/DC Voltage& Current, Resistance, Diode, Stability, non-contact Voltage, Capacitance, Frequency, Duty Cycle, and Type-K Temperature. Maintaining this meter will ensure long-term usability. The EX330 is the most reasonable mini tester with Type-K Temperature capabilities. This meter also has an incorporated non-contact AC Voltage sensor that makes finding live wires easy.