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Review

Fluke 374 FC Review: Connected True-RMS AC/DC Clamp Meter

The Fluke 374 FC is the entry point to Fluke Connect clamp meters: 600 A AC and DC through the jaw, 2500 A AC with an optional iFlex, and Bluetooth readings on a phone so the meter can stay in the panel. This review covers what the wireless link adds and what the 374 FC leaves to the 375 and 376.

By the Akermin Editorial Team · 4 min read

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Fluke 374 FC Review: Connected True-RMS AC/DC Clamp Meter

Fluke · FLUKE-374 FC 600A Ac/Dc TRMS Wireless Clamp

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Price and availability are shown on Amazon and can change at any time.

Verdict

The Fluke 374 FC is a 600 A True RMS AC/DC clamp meter whose main feature is that the reading does not have to be taken at the meter. Fluke Connect sends measurements to a phone over Bluetooth, so the meter can stay clamped inside a panel while the technician reads it from a distance, with the door closed, and records the result to the phone and the cloud. An optional iFlex flexible probe extends AC current to 2500 A. It lacks the FieldSense non-contact voltage of the 377 FC and the higher jaw limit of the 375 FC and 376 FC. For a maintenance team that wants documented readings and safer distance without paying for FieldSense, the documentation supports it as the practical entry to the range.

Who It Is For

  • Maintenance electricians who record readings for equipment histories.
  • Teams that want to reduce time spent inside the arc-flash boundary.
  • Users who want a Fluke 600 A AC/DC clamp and see wireless as a bonus.

Documented Specifications

Item Documentation
Current through jaw AC and DC to 600 A, True RMS
Extended AC current To 2500 A with optional iFlex flexible probe
Voltage and current True RMS for non-linear signals
Connectivity Fluke Connect Measurements to a smartphone
Recording Results saved to phone and cloud

The voltage range, resistance and other functions, and the safety category rating are on the manufacturer’s datasheet, which should be consulted for the current revision.

What Wireless Changes in Practice

The manufacturer’s phrasing is that you can read measurements at a safe distance while the meter takes all the risk. The routine goes: open the enclosure in full protective equipment, clamp the meter on the conductor, close the door, step back, and read or log from the phone. The second gain is documentation. Instead of writing readings on a clipboard, each measurement is time-stamped in the app and can be attached to an asset. Over months this builds a history that shows a motor’s current creeping up before it fails. The constraints are Bluetooth range, which is a few tens of metres in open air and less through metal enclosures, and the need for a Fluke Connect account. Our guide to choosing a clamp meter discusses when wireless is worth the premium.

The Optional iFlex

The 600 A jaw covers most panel work. Where it does not, the iFlex wraps around busbars and cable bundles and reads AC current to 2500 A. It is thin enough to slip behind a conductor in a crowded switchboard. Because it is a separate purchase for the 374 FC, buyers who know they will need it should compare the price of the 374 FC plus iFlex with a kit that includes it. The iFlex is AC only; DC current still needs the jaw.

Build and Ergonomics

The 374 FC uses the same body as the rest of the 37x series: a large backlit display, a substantial jaw and a hook for hanging in a panel. It is not compact. Owners generally describe the display as easy to read and the meter as solid, in keeping with the series. For the technique that applies to all clamps, see measuring current with a clamp meter.

Practical Notes

Before relying on the wireless link inside a metal enclosure, check the connection with the door closed; owners report that range drops sharply through steel. The app can record at intervals, so a motor that trips intermittently can be logged overnight with the meter left in place and the phone nearby on charge. The voltage function still needs test leads, and the meter should be zeroed on the DC current range before each measurement. Keep the iFlex, if purchased, in the same case; its connector is specific to the meter.

Strengths

  • Readings from a distance with less protective equipment.
  • Time-stamped records to phone and cloud.
  • 600 A AC and DC with True RMS.
  • Path to 2500 A AC with the iFlex.

Limitations

  • No FieldSense; voltage needs test leads.
  • iFlex is optional, not included.
  • Full-size body; not the meter for tight residential work.

How It Compares

The Fluke 377 FC adds FieldSense and a 1000 A jaw with the iFlex included. The Fluke 381 achieves distance reading with a detachable display and needs no phone. The Fluke 325 is the compact 400 A option without wireless for technicians who mostly work in residential and light commercial panels.

How We Research

This review is based on the manufacturer’s published specifications, the Amazon product listing and owner reports. We did not run laboratory tests.

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

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

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Fluke 325 True-RMS Clamp Meter with Frequency, Temperature & Capacitance Measurements

Fluke 325 True-RMS Clamp Meter with Frequency, Temperature & Capacitance

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Fluke 381 Remote Display True-RMS AC/DC Clamp Meter with iFlex

Fluke 381 Remote Display True-RMS AC/DC Clamp Meter with iFlex

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Products shown because their documented specifications fit this guide. Price and availability are on Amazon and can change.

Frequently Asked Questions

What does Fluke Connect do on the 374 FC?

It sends readings over Bluetooth to the Fluke Connect phone app so you can read the meter from a distance, record measurements to the phone and the cloud, and share them.

Is the iFlex included with the 374 FC?

No. The listing states that the 2500 A AC measurement uses an optional iFlex flexible current probe. The 375 FC and 376 FC include it in some kits.

Does the 374 FC have FieldSense?

No. FieldSense non-contact voltage is on the 377 FC and 378 FC. The 374 FC measures voltage with test leads in the conventional way.

Why read the meter from a phone?

It lets one person clamp the meter inside an energised enclosure, step back outside the arc-flash boundary, close the door and take the reading with less protective equipment on.

Affiliate disclosure: Akermin earns a commission from qualifying Amazon purchases made through links on this page. Our editorial picks are based on documented specifications and owner feedback, not commissions.