• 1000V in both AC and DC modes
  • Up to 1000A with clamp jaws
  • Up to 2500A with included iFlex flexible current probe
  • 1 to 1,000μF capacitance
  • 14 to 122°F (-10 to 50°C) operating temp
  • PQ function for identifying power quality issues
  • CAT IV 600V and CAT III 1000V safety ratings

What's in the Box

  • iFlex current probe (18 inches; 48 cm)
  • TL224 silicone insulated test leads
  • TP175 adjustable length test probes
  • AC285 grounding clip, black
  • TPAK magnetic hanging kit, with 9 inch (23 cm) hanging strap
  • Premium carrying case
  • Quick reference guide


The Fluke 378 FC True RMS clamp meter uses FieldSense™ technology to make testing faster and safer, all without touching a live conductor. It can read up to 1000V and 1000A in both AC and DC modes. Use the included iFlex flexible current probe to measure AC current as high as 2500A. The iFlex probe provides access to large conductors in tight spaces.

The 378 FC clamp meter includes a unique PQ function that senses power quality issues automatically. When making FieldSense measurements, the 378 FC will detect and display power quality issues, relating to current, voltage, power factor or any combination of the three. Now you can quickly determine if an upstream supply problem exists, or if there is a downstream equipment problem.

Full set of phase-to-ground, phase-to-phase values, and phase rotation is calculated and shown on the meter, displayed on your smart phone and saved to the cloud via Fluke Connect software.

As part of the Fluke Connect family of wireless tools, this clamp meter can now:

  • Trend measurements to pinpoint intermittent faults
  • Transmit results wirelessly via Fluke Connect app
  • Create and send reports right from the field