FLUKE-279-FC-iflex True RMS Thermal Multimeter

See Hot Spots And Electrical Values In One Trusted Fluke Instrument

The Fluke 279 FC iFlex True-RMS Thermal Multimeter combines a full digital multimeter with a built-in thermal imager so technicians can find, verify, and document electrical problems faster and safer. Scan for hot spots with the 102 × 77 IR camera, capture load measurements up to 2500 A AC using the included iFlex probe, and send results wirelessly through Fluke Connect to reduce time in front of live panels and improve troubleshooting efficiency.

Key Benefits & Features

• Integrated thermal imaging: Built-in 102 × 77 infrared camera quickly reveals hot connections, overloaded components, and insulation issues so you can see exactly where to measure from a safe distance.
• Full-function True-RMS DMM: Includes 15 measurement functions such as AC/DC voltage, resistance, continuity, capacitance, frequency, diode test, and min/max/avg, all housed in a safety-rated CAT IV 600 V / CAT III 1000 V instrument.
• iFlex flexible current probe: The included 18 in iFlex probe lets you work in tight, hard-to-reach spaces, measuring up to 2500 A AC without breaking the circuit.
• Wireless Fluke Connect: Transmit readings and images wirelessly to a smartphone up to 20 feet (6.1 m) away (unobstructed), compare against historical data, and create reports without returning to the office.
• Rugged all-day tool: Features a large 3.5 in color LCD, 6000-count DMM display, and a rechargeable lithium-ion battery that allows for 10+ hours of operation under normal conditions.

Ideal Use Cases

• Industrial and commercial electrical maintenance teams diagnosing overloaded circuits, breakers, and feeders.
• Panel builders and switchgear technicians verifying terminations, bus bars, and control wiring under load.
• HVAC and facility engineers checking motors, drives, contactors, and distribution boards for early failure signs.
• Field service engineers supporting remote plants who need to capture images and readings for offsite review.
• Electrical safety and reliability programs that require documented thermal and electrical inspection data.

Technical Specifications

• Measurement functions: AC/DC voltage, AC current with iFlex, resistance, continuity, capacitance, frequency, diode test, min/max/avg, True-RMS (total 15 functions).
• AC voltage range: 600.0 mV to 1000 V, with full-time low-pass filter for variable-speed drive signals.
• DC voltage range: 600.0 mV to 1000 V with up to 0.09% basic accuracy on main ranges.
• AC current range: 999.9 A direct and up to 2500 A AC using the included iFlex flexible current probe.
• Resistance and continuity: Up to 50 MΩ resistance with audible continuity beeper below 25 Ω.
• Capacitance range: Up to 9999 µF for testing motors, filters, and control circuits.
• Infrared camera: -10 °C to 200 °C temperature range, 0.1 °C resolution, and ≤ 200 mK sensitivity.
• Display: 3.5 in (8.9 cm) color LCD with 6000-count DMM and 10000-count frequency display.
• Safety rating: CAT III 1000 V, CAT IV 600 V for work on distribution panels and feeders.
• Power and dimensions: Fluke BP500 rechargeable lithium-ion battery (10+ hours life), approx. 5.7 × 9.4 × 21.6 cm and 0.80 kg.

Upgrade Your Thermal And Electrical Troubleshooting In One Step

Equip your team with the FLUKE-279-FC-iFlex to capture both thermal images and precise electrical measurements in a single trip and order today.

Model	Fluke 279 FC
Product Type	True-rms Thermal Multimeter
Thermal Imager	Built-in infrared camera, 102 × 77 resolution
Infrared Temperature Range	-10 °C to 200 °C (14 °F to 392 °F)
Thermal Sensitivity (NETD)	≤ 200 mK
Field of View	36° (w) × 27° (h)
Distance to Spot	162:1
Display	3.5 in (8.9 cm) color LCD; 6000 counts volts, amps, ohms; 10000 counts frequency; 1000 counts capacitance
Measurement Functions	15 functions: AC voltage with low-pass filter, DC voltage, resistance, continuity, capacitance, diode test, min/max/avg, AC current (with iFlex), frequency
AC Voltage Range	600.0 mV to 1000 V
DC Voltage Range	600.0 mV to 1000 V
Resistance Range	600.0 Ω to 50.00 MΩ
Capacitance Range	1000 nF to 9999 µF
AC Current Range	999.9 A; up to 2500 A AC with iFlex flexible current probe
Frequency Range	99.99 Hz and 999.9 Hz
True RMS	Yes
Safety Rating	CAT III 1000 V, CAT IV 600 V
Maximum Voltage to Earth	1000 V between any terminal and earth ground
Power	Fluke BP500 lithium ion battery
Battery Life	10 hours minimum
RF Communications	2.4 GHz ISM band; up to 20 m open air, up to 6.5 m through sheetrock wall, up to 3.5 m through concrete wall or steel electrical enclosure
Operating Temperature	-10 °C to 50 °C (14 °F to 122 °F)
Storage Temperature	-20 °C to 60 °C (-4 °F to 140 °F)
Relative Humidity	0% to 90% (0 °C to 35 °C); 0% to 75% (35 °C to 40 °C); 0% to 45% (40 °C to 50 °C)
Operating Altitude	2000 m
Storage Altitude	12000 m
Size (H × W × L)	5.7 cm × 9.4 cm × 21.6 cm (2.3 in × 3.7 in × 8.5 in)
Weight	0.80 kg (1.75 lb)
Certifications	CSA, FCC, CE

AC Voltage	Ranges 600.0 mV, 6.000 V, 60.00 V, 600.0 V, 1000 V; Resolution 0.1 mV to 1 V; Accuracy 45 Hz to 65 Hz: ±(1.0% + 3); 65 Hz to 200 Hz: ±(4.0% + 3); 200 Hz to 500 Hz: ±(15% + 3); crest factor ≤ 3 at full scale up to 500 V; full time low pass filter; do not exceed 107 V-Hz
AC mV	Range 600.0 mV; Resolution 0.1 mV; Accuracy 45 Hz to 500 Hz: ±(1.0% + 3)
DC Voltage	Ranges 6.000 V, 60.00 V, 600.0 V, 1000 V; Resolution 0.001 V to 1 V; Accuracy 6 V to 600 V: ±(0.09% + 2); 1000 V: ±(0.15% + 2)
DC mV	Range 600.0 mV; Resolution 0.1 mV; Accuracy ±(0.09% + 2)
Resistance	Ranges 600.0 Ω, 6.000 kΩ, 60.00 kΩ, 600.0 kΩ, 6.000 MΩ, 50.00 MΩ; Resolution 0.1 Ω to 0.01 MΩ; Accuracy 600 Ω: ±(0.5% + 2); 6 kΩ to 600 kΩ: ±(0.5% + 1); 50 MΩ: ±(1.5% + 3)
Continuity	Range 600 Ω; Resolution 1 Ω; Beeper on at < 25 Ω; detects opens or shorts of 600 µs or longer
Diode Test	Range 2.000 V; Resolution 0.001 V; Accuracy ±(1% + 2)
Capacitance	Ranges 1000 nF, 10.00 µF, 100.0 µF, 9999 µF; Resolution 1 nF to 1 µF; Accuracy 1000 nF to 100 µF: ±(1.2% + 2); 9999 µF: ±10% typical
AC Current (with iFlex)	Ranges 999.9 A, 2500 A; Resolution 0.1 A and 1 A; Accuracy 45 Hz to 500 Hz: ±(3.0% + 5)
Frequency	Ranges 99.99 Hz and 999.9 Hz; Resolution 0.01 Hz and 0.1 Hz; Accuracy ±(0.1% + 1)
Voltage Input Characteristics	AC, DC, mV inputs: nominal input impedance > 10 MΩ, < 100 pF; common mode rejection ratio > 60 dB DC to 60 Hz (AC volts), > 120 dB at DC, 50 Hz or 60 Hz (DC volts and mV); normal mode rejection > 60 dB at 50 Hz or 60 Hz; overload protection 1100 V rms
Resistance / Capacitance Input	Open circuit test voltage < 2.7 V DC; full scale voltage to 6 MΩ < 0.7 V DC; full scale voltage 50 MΩ < 0.9 V DC; typical short circuit current < 350 mA; overload protection 1100 V rms
Continuity / Diode Input	Open circuit test voltage < 2.7 V DC; full scale voltage 2.000 V DC; typical short circuit current < 1.1 mA
MIN/MAX Recording	AC functions: captures changes > 900 ms, 40 counts; DC functions: captures changes > 350 ms, 12 counts
Infrared Camera Temperature	Range -10 °C to 200 °C; resolution 0.1 °C; centerpoint temperature measurement; accuracy ±5 °C or ±5%, whichever is greater, at 25 °C ambient; emissivity 0.95 fixed
Infrared Camera Optics	Resolution 102 × 77; image capture frequency 8 Hz; detector type uncooled vanadium oxide; infrared spectral band 7.5 µm to 14 µm
Image Capture / Storage	Image review before save; internal memory stores up to 100 images; image transfer via Fluke Connect or SmartView software; file format .is2
Display Update Rate	4 readings per second
Temperature Coefficient	0.1 × specified accuracy per °C for temperatures below 18 °C or above 28 °C
Environmental Conditions	Operating temperature -10 °C to 50 °C; storage temperature -20 °C to 60 °C; relative humidity 0% to 90% (0 °C to 35 °C), 0% to 75% (35 °C to 40 °C), 0% to 45% (40 °C to 50 °C); operating altitude 2000 m; storage altitude 12000 m
Safety / Compliance	Maximum voltage between any terminal and earth ground 1000 V; measurement category CAT III 1000 V, CAT IV 600 V; certifications CSA, FCC, CE

Included (279 FC/iFlex)	Fluke 279 FC True-rms Thermal Multimeter; 18 in (45.72 cm) iFlex flexible current probe; TL175 test leads; rechargeable lithium ion battery; battery charger; soft carrying case; hanging strap
Included (FLUKE-279FC I/B)	Fluke 279 FC True-rms Thermal Multimeter; 18 in (45.72 cm) iFlex flexible current probe; TL175 test leads; two rechargeable lithium ion batteries; one charger; soft carrying case; hanging strap
Optional Current Probes	Fluke i2500-10 iFlex Flexible Current Probe
Optional Power	Fluke BC500 AC Power Charger; Fluke BP500 Lithium Ion Battery 3000 mAh
Optional Cases	Fluke C280 Carrying Case

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DOMESTIC -

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