Non-Contact Voltage Clamp Meters

April 20, 2021
The Fluke 377FC/378 FC Non-Contact Voltage True-RMS AC/DC Clamp Meters can measure voltage and current simultaneously without touching a live wire.

Reducing the risk of electrical shock, the Fluke 377 FC and 378 FC Non-Contact Voltage True-RMS AC/DC Clamp Meters are the only clamp meters that make accurate non-contact voltage measurements without test leads.


The 377 and 378 clamp meters use Field-Sense technology to make testing faster and safer, all without touching a live conductor. You get accurate voltage and current measurements through the clamp jaw by simply clipping the black test lead to any electrical ground and then put the clamp jaw around the conductor to see voltage and current values simultaneously on the dual display.


Both clamp meters offer complete 3-phase voltage and current tests in three quick steps. A full set of phase-to-ground and phase-to-phase values are displayed on the meter. These measurements along with phase rotation information are displayed on your smartphone and saved to the cloud via Fluke Connect software, eliminating the need for handwritten notes or complicated math. With Fluke Connect, users can remotely log, trend, and monitor measurements to pinpoint intermittent faults. This data gathered can be used as a basis for designing a preventive maintenance program.


The 378 FC also includes a unique power quality indicator that senses PQ issues—relating to current, voltage, power factor or any combination of the three—automatically while capturing voltage and current measurements. With this PQ indicator, it is easy to quickly determine if an upstream supply problem exists or if there is a downstream equipment problem.


These clamp meters come with an iFlex flexible current probe that can measure ac current as high as 2,500 A—even in tight spaces. Also included are a TPAK magnetic hanging kit with a 9 in. (23 cm) hanging strap that allows the clamp to be hung wherever it is needed, a premium carrying case, TL224 test leads, TP175 Twist Guard Test Probes, and an AC285 black grounding clip.

  • Measure voltage and current with your clamp jaw
  • Faster, safer testing with FieldSense technology
  • Power quality indicator shows whether equipment or power line is faulty (378 FC Clamp Meter only)
  • Complete 3-phase voltage and current tests in 3 quick steps
  • Price: $699.99 (377FC) / $849.99 (378FC)

The 377FC/378FC current clamp includes:

  • 378FC or 377FC Non-Contact Voltage True-RMS Clamp Meter
  • iFlex flexible current probe (18 in.; 48 cm)
  • TL224 silicone insulated test leads
  • TP175 adjustable length test probes
  • AC285 grounding clip (black, quantity one)
  • TPAK magnetic hanging kit, with 9 in. (23 cm) hanging strap
  • Premium Carrying case
  • Quick reference guide