Fluke 377 FC FieldSense Clamp Meter

Fits feeder and motor checks where FieldSense non-contact voltage/current through the jaw is required — jaw AC/DC to 999.9 A, included iFlex AC to 2500 A, FieldSense AC voltage to 1000 V, test-lead V to 1000 V, and CAT III 1000 V / CAT IV 600 V with Fluke Connect.

Key advantages

FieldSense through the jaw — Non-contact AC voltage/current path to 1000 V class with dual readout.
Jaw 999.9 A + iFlex 2500 A — i2500-18 iFlex included with TPAK and lead kit.
Green stable screen — Visual cue for stable FieldSense / continuity.
CAT III 1000 V / CAT IV 600 V — Fluke Connect Bluetooth logging and 3-phase FC workflows.

Typical applications

Feeder checks where FieldSense non-contact voltage/current through the jaw is preferred.
Motor and panel work needing included iFlex for high AC or awkward conductors.
Technicians documenting clamp readings over Fluke Connect.

Selection guide

Measuring range — Jaw AC/DC current to 999.9 A; iFlex AC to 2500 A; FieldSense AC voltage to 1000 V; test-lead AC/DC voltage to 1000 V; resistance to 60 kΩ; capacitance to 1000 µF; frequency to 500 Hz; mV DC 500.0 mV.
Accuracy — AC current jaw 2% ±5 digits (45–66 Hz); DC current 2% ±5 digits (with ZERO); iFlex AC 3% ±5 digits; FieldSense AC voltage 3% ±5 digits (≤4/0 AWG); test-lead AC voltage 1% ±5 digits.
Output — Fluke Connect logging/reporting; visual continuity (green display).
Supply — 2× AA IEC LR6 alkaline; ~200 h life.
IP — IP30 (jaw closed).
Ambient — Operating −10…+50 °C; storage −40…+60 °C; operating altitude 2000 m.
Connection — 34 mm jaw; included i2500-18 iFlex; TL224 leads + TP175 probes; AC285 grounding clip.
Display — Dual readout; green screen for stable FieldSense / continuity.
Communication — Fluke Connect (Bluetooth).
Approvals — CAT III 1000 V, CAT IV 600 V, True-RMS, FieldSense.
Mounting — Handheld; TPAK magnetic hanger included.
Weight — 463 g (with batteries).
Notes — FieldSense non-contact voltage/current through jaw; 3-phase measurements via Fluke Connect. OEM Product Specifications + Users Manual..

Common mistakes

Using FieldSense without the grounding clip path when the procedure requires it — kit lists AC285 grounding clip.
Assuming FieldSense voltage accuracy matches test-lead accuracy — FieldSense AC voltage 3% ±5 digits (≤4/0 AWG); test-lead AC voltage 1% ±5 digits.
Ignoring altitude limit 2000 m operating (vs 3000 m on some 370 FC siblings).
Treating green-screen continuity/FieldSense indication as a process output.

When to RFQ / what to tell us

Need for FieldSense vs test-lead voltage path; max current jaw vs iFlex.
Confirm included i2500-18 iFlex / TPAK / TL224+TP175 / AC285 kit yes/no.
Quantity, ship-to, ambient (−10…+50 °C), altitude ≤2000 m operating.

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Specs

Spec	Value
SKU	42413
Brand	Fluke
Model	377 FC
Product type	clamp_meter
Measuring range	Jaw AC/DC current to 999.9 A; iFlex AC to 2500 A; FieldSense AC voltage to 1000 V; test-lead AC/DC voltage to 1000 V; resistance to 60 kΩ; capacitance to 1000 µF; frequency to 500 Hz; mV DC 500.0 mV
Accuracy	AC current jaw 2% ±5 digits (45–66 Hz); DC current 2% ±5 digits (with ZERO); iFlex AC 3% ±5 digits; FieldSense AC voltage 3% ±5 digits (≤4/0 AWG); test-lead AC voltage 1% ±5 digits
Output signal	Fluke Connect logging/reporting; visual continuity (green display)
Supply voltage	2× AA IEC LR6 alkaline; ~200 h life
IP rating	IP30 (jaw closed)
Ambient temperature	Operating −10…+50 °C; storage −40…+60 °C; operating altitude 2000 m
Electrical connection	34 mm jaw; included i2500-18 iFlex; TL224 leads + TP175 probes; AC285 grounding clip
Display	Dual readout; green screen for stable FieldSense / continuity
Communication	Fluke Connect (Bluetooth)
Approvals	CAT III 1000 V, CAT IV 600 V, True-RMS, FieldSense
Mounting	Handheld; TPAK magnetic hanger included
Weight	463 g (with batteries)
Notes	FieldSense non-contact voltage/current through jaw; 3-phase measurements via Fluke Connect. OEM Product Specifications + Users Manual.

Documents

FAQ

Q: What is FieldSense here? A: Non-contact voltage/current through the jaw; FieldSense AC voltage to 1000 V with listed accuracy 3% ±5 digits (≤4/0 AWG). Dual readout with green screen for stable FieldSense/continuity.

Q: Is iFlex included? A: Yes per clean sample — i2500-18 iFlex included, plus TL224 leads, TP175 probes, AC285 clip, TPAK.

Q: What should I send for a quote? A: FieldSense vs lead path, current needs, quantity. Compatible with systems using Fluke 377 FC — we do not claim authorized-dealer status.