Fluke 320 Series True-rms Clamp Meters are designed for harsh environment use in commercial, light industrial, HVAC, and residential applications. These meters have a slim ergonomic design and a smaller jaw. The 320 series measures up to 400A ac current and 600V ac and dc voltage. The 324 and 325 models also measure temperature and capacitance. The 325 model makes both AC and DC measurements, as well as frequency and min/max. Learn more.