Fluke 279 FC True-rms Thermal Multimeter

Fluke 279 FC True-rms Thermal Multimeter is rated 3.7 out of 5 by 16.
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  • Fluke 279 FC
  • Fluke 279 FC True-RMS
  • Fluke 279 FC True-RMS
  • Fluke 279 FC True-RMS

Key features

  • Full-featured multimeter with built-in thermal imager 
  • 15 measurement functions including voltage ac and dc, resistance, continuity, capacitance, diode test, Min/Max/Avg, current ac with included iFlex current probe
  • Assembled in the USA
  • Three year standard warranty
  • CAT III 1000 V, CAT IV 600 V measurement category
  • Designed for durability, built to withstand a 1 m (3 ft) drop, double insulated with raised rubber holster for increased protection

Product overview: Fluke 279 FC True-rms Thermal Multimeter

Find, repair, validate, and report electrical issues quickly


Locate the problem immediately

Thermal imaging multimeters are a first-line troubleshooting tool for electrical equipment that can check hot spots on high-voltage equipment and transformers, and detect heating of fuses, wires, insulators, connectors, splices and switches. Scanning with the 279 FC's thermal imager reveals many electrical issues rapidly and from a safe distance. By combining two tools into one, the thermal multimeter lightens the load and increases productivity.

Expanded functionality

Compatible with iFlex® (a flexible current clamp) to expand your measurement capabilities and get into tight, hard to reach spaces for current measurement (up to 2500 A AC). The large full-color LCD screen makes for easier and clearer viewing of images and readings. The 10 hour+ rechargeable battery keeps you going all day long under normal conditions.

With built-in Fluke Connect®, transmit results wirelessly to a smartphone and save time on reporting to validate work is complete. Troubleshoot better by instantly trending and monitoring measurements live on your smartphone screen. Create and email reports right from the field.

 Fluke 115 Field Technicians Digital MultimeterFluke 87V Industrial MultimeterFluke 3000 FC Series Wireless MultimeterFluke 1587 FC Insulation MultimeterFluke 279 FC True-rms Thermal Multimeter
CAT ratingCAT III 600 VCAT III 1000 V
CAT IV 600 V
CAT III 1000 V
CAT IV 600 V
CAT III 1000 V
CAT IV 600 V
CAT III 1000 V
CAT IV 600 V
True-rms readings
Voltage AC/DC600 V1000 V1000 V1000 V1000 V
Current AC/DC10 A10 A400 mA400 mA2500 A AC (with iFlex)
Resistance40 MΩ50 MΩ50 MΩ50 MΩ50 MΩ
Capacitance10,000 μF10,000 μF10,000 μF10,000 μF10,000 μF
Temperature--200.0 °C to 1090 °Cwith t3000 FC-40 °C to 537 °CInfrared camera
-10 °C to 200 °C
Infrared camera----
Continuity/diode testFrequency,
continuity/diode test,
motor drive (VFD)
duty cycle,
microamps, analog
bar graph, relative
continuity/diode test.
Able to connect to
three 3000 FC
Frequency, Pi/DAR
timed ratio tests,
continuity/diode test, motor drive (VFD)
microamps, relative
continuity/diode test,
motor drive (VFD)

What's in the box:

  • 279 FC Thermal Multimeter
  • 45.72 cm (18 in) iFlex flexible current probe
  • (1 pair) TL175 test leads
  • Rechargeable lithium ion battery and charger
  • Soft carrying case
  • Hanging strap    
  • Quick reference guide

Specifications: Fluke 279 FC True-rms Thermal Multimeter

Basic dc accuracy0.09%
Bandwidth1% 45 Hz to 65 Hz, full time low pass filter
Voltageac/dc 1000 V
Current ac2500 A with included iFlex Flexible Current Probe
Resistance50 MΩ
Frequency100 kHz
Capacitance9,999 µF
Continuity with beeperYes
Diode testYes
Min/Max recordingYes
Display HoldYes
Infrared camera
Infrared resolution102 x 77
Image capture frequency8 Hz
Field of View36° (w) x 27° (h)
NETD≤200 mK
Infrared spectral band7.5 to 14 microns
Center pointYes (with center point temp)
Focus mechanismFixed focus
Temperature Range (selectable °C and °F)-10 °C to 200 °C (14 °F to 392 °F) Accuracy: ±5 °C (9 °F) or (±5% as tested)
Emissivity0.95 fixed
Background compensation20 °C fixed
Memory storageApproximately 100 images (internal)
File formatNon-radiometric .is2
General specifications
Battery typeRechargeable lithium ion battery (charge time: 4.5 hours)
Operating temperature-10 °C to 50 °C (14 °F to 122 °F)
Storage temperature-20 ºC to 60 ºC (-4 °F to 140 °F)
Relative humidity0% to 90% (0 °C to 35 °C) (32 °F to 95 °F)
0% to 75% (35 °C to 40 °C) (95 °F to 104 °F)
0% to 45% (40 °C to 50 °C) (104 °F to 122 °F)
Altitude2,000 meters (6,561 feet)
Temperature coefficientAdd 0.1 x specified accuracy for each °C above 28 °C or below 18 °C (°F above 82 °F or below 64° F)
Ingress Protection(IP) IP40 (non-operating)
Wireless frequency2.4 GHz ISM Band, 20 meter range
CertificationsCE, CSA, FCC
Safety complianceIEC 61010-1: Pollution degree 2; IEC 61010-2-033: CAT III 1000 V/CAT IV 600 V
EMCEN 61326-1:2012
Size215.9 x 93.9 x 57.1 mm (8.5 x 3.7 x 2.25 in)
Weight0.793 kg (1.75 lb)
WarrantyLimited three-year warranty

Models: Fluke 279 FC True-rms Thermal Multimeter

Fluke 279 FC/iFlex
Fluke 279 FC/iFlex
Buy it


  • 279 FC TRMS Thermal Multimeter
  • 45.72 cm (18 in) iFlex Flexible Current Probe
  • (1 pair) TL175 Test Leads
  • Rechargeable Lithium Ion Battery and Charger
  • Soft Carrying Case
  • Hanging strap
Fluke 279 FC I/B
Fluke 279 FC I/B
Buy it
  • 279 FC True-rms Thermal Multimeter
  • 45.72 cm (18 in) iFlex Flexible Current Probe
  • (1 pair) TL175 Test Leads
  • (2) Rechargeable Lithium Ion Batteries and Charger
  • Soft Carrying Case
  • Hanging strap
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Rated 5 out of 5 by from The Best Tool In My Bag I religiously take this item with me to work because it is such a life saver. It will also save room in your back because you are combining many different tools. It is a bit pricey, but worth the money!! You will not regret this purchase!! I work in data centers and this thing saves me time daily because i can quickly see my hot spots and check voltages to problem areas.
Date published: 2016-12-22
Rated 5 out of 5 by from Best investment we've made in a while. Thermal imaging with the I Flex clamp.......what more do I need to say? Oh yes, its compatible with Fluke Connect. First time we used it we found 2 loose lugs.
Date published: 2016-12-08
Rated 5 out of 5 by from love this meter This is a great meter but when you add the iflex and thermal imaging this thing is awesome! Love it!
Date published: 2016-12-08
Rated 5 out of 5 by from It's a great investment I bought this with high expectations. And it hasn't let me down. It is quick and very versatile. I use it to find hot spots in the electrical panels and overheating bearings in electric motors. With the amp hoop it's a great tool.
Date published: 2016-12-08
Rated 5 out of 5 by from Great Meter! This meter has everything we need to troubleshoot our cranes in one device. My Electricians use theirs daily. It has helped us cut down time and the IR camera makes it easy to identify hot-spots and pending failures.
Date published: 2016-12-07
Rated 5 out of 5 by from PERFECT FOR MOTORS,HVAC EQUIPMENT VFDS This is the best meter for the dollar I have found, the imagery is decent and flukeconnect is the way to go
Date published: 2016-11-03
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