Fluke 377FC AC/DC TRMS Non-Contact Voltage Wireless Clamp - Safe

Our review of the Fluke 377FC clamp meter finds it best suited to electricians and maintenance technicians who need accurate, hands-off voltage and current measurements. The single biggest reason to buy is its FieldSense technology, which lets a user measure voltage and current through the clamp jaw or non-contact method without touching a live conductor, speeding testing while improving safety. The meter also pairs with Fluke Connect software to log and share readings, making it useful for troubleshooting and record keeping on the job.

Key Features

• FieldSense technology: Enables safer, non-contact voltage and current testing so the technician does not need to directly touch a live conductor.
• Clamp jaw measurement: Provides true-rms current and voltage readings directly through the clamp jaw for reliable values in real-world electrical systems.
• iFlex compatibility: Allows extended current range with a flexible current probe for measurements in tight or awkward locations, increasing versatility.
• Fluke Connect software: Lets users log, save and share readings wirelessly so data can be archived and reviewed offsite.
• Three-phase testing: Supports complete 3-phase voltage and current tests with fewer steps, streamlining diagnostics on industrial panels.

Who It's For

The Fluke 377FC is aimed at professional electricians, industrial maintenance teams and field service technicians who need accurate AC/DC TRMS measurements and safer non-contact testing methods. Its data logging and wireless sharing make it valuable for workplaces that require traceable test results or remote collaboration.

Users who primarily need a basic, low-cost clamp meter for occasional home use should look elsewhere, as this unit is designed for professional workflows and includes features like iFlex and software connectivity that exceed simple consumer needs.

Pros & Cons

Pros

• Accurate voltage and current readings using true-rms measurement for real-world signals.
• FieldSense enables faster, safer tests without direct contact with a live conductor.
• Wireless logging via Fluke Connect simplifies record keeping and sharing of readings.

Cons

• Some users report mixed results with the iFlex accessory in specific setups, making it less consistent for certain measurements.
• The feature set and professional build may be more than needed for casual or infrequent users, affecting perceived value for money.

Specifications

Our Verdict

The Fluke 377FC is a strong choice for professionals who prioritize safety and data capture in electrical diagnostics; its FieldSense non-contact capability and true-rms measurements make routine and three-phase testing quicker and more reliable. For technicians who will use the wireless logging and iFlex features, it represents good value; casual users may find the feature set more than required.

Frequently Asked Questions

Can this meter measure without touching a live conductor?
Yes. The meter uses FieldSense technology to measure voltage and current through the clamp jaw or via a grounded reference without touching the live conductor.

Does it support logging and sharing of readings?
Yes. The meter pairs with Fluke Connect software to log, save and share readings wirelessly for offsite review and documentation.

Is the iFlex accessory required for all current measurements?
No. The clamp jaw provides standard current measurements; iFlex is an optional flexible probe intended for extended range and access to tight spaces, though some users report mixed results in specific situations.