The FLIR GF309 is an IR camera for the high-temperature measurement of industrial furnaces, chemical heaters, and coal-fired boilers, without the need to shut down the operation. The portable camera also greatly improves operator safety, by measuring through flames at a safe distance, for all types of furnaces. A good knowledge of the furnace condition can avert failures and unscheduled shutdowns. 

Industrial furnaces, heaters, and boilers are found in the chemical, petrochemical, and utility industries.


See through flames
The GF309 is equipped with a special “flame filter” that allows you to see and measure high temperatures (up to +1500°C) through flames. Ideal for furnace and boiler inspections.
Wide temperature range
The FLIR GF309 visualizes temperatures from -20°C to +1,500°C. This makes the camera extremely suited for high temperature inspections.
Dual use

The FLIR GF309 can be used both for internal and external furnace and maintenance inspections and can make also the smallest of temperature differences clearly visible.

Heat shield
A nickel coated heat shield improves worker safety and comfort during inspection.
Available lenses
The FLIR GF309 comes either with a fixed 14.5° lens or with a fixed 24° lens. A version with interchangeable lenses is also available but requires a US Department of State license.

Cooled detector
The FLIR GF309 contains a cooled Indium Antimonide (InSb) detector. This highly sensitive detector is spectrally tuned to 3.8 - 4.05 micrometer waveband for seeing through flames.

Imaging and optical data
Field of view (FOV) / Minimum focus distance 14.5º lens: 14.5° x 10.8° / 0.5 m
24º lens: 24º x 18º / 0.3 m
F-number 1.5
Thermal sensitivity/NETD <15 mK @ +30°C
Focus Automatic (one touch) or manual (electric or on the lens)
Zoom 1–8× continuous, digital zoom
Digital image enhancement Noise reduction filter
Focal Plane Array (FPA) / Spectral range Cooled InSb / 3.8–4.05 µm
IR resolution 320 × 240 pixels
Sensor cooling Stirling Microcooler (FLIR MC-3)
Electronics and data rate
Full frame rate 60 Hz
Image presentation
Display Built-in widescreen, 4.3 in. LCD, 800 × 480 pixels
Viewfinder Built-in, tiltable OLED, 800 × 480 pixels
Automatic image adjustment Continuous/manual; linear or histogram based
Manual image adjustment Level/span
Image modes IR-image, visual image
Temperature range –20 to +1500°C
Accuracy ±1°C for temperature range (0-100 °C)
  or ±2% of reading for temperature range (> +100 °C)
Measurement analysis
Spotmeter 10
Area 5 boxes with max/min/average
Profile 1 live line (horizontal or vertical)
Difference temperature Delta temperature between measurement functions >or reference temperature
Reference temperature Manually set or captured from any measurement function
Emissivity correction Variable from 0.01 to 1.0 or selected from editable materials list
Reflected apparent temperature correction Automatic, based on input of reflected temperature
Measurement corrections Reflected temperature, distance, atmospheric transmission, humidity, external optics
Menu commands Level, span, Auto adjust continuous/manual/semi-automatic, Zoom, Palette, Start/stop recording, Store image, Playback/recall image
Color palettes Iron, Gray, Rainbow, Arctic, Lava, Rainbow HC
Set-up commands 1 programmable button, local adaptation of units, language, date and time formats
Storage of images
Image storage type Removable SD or SDHC Memory Card, two card slots
Image storage capacity > 1200 images (JPEG) with post process capability per GB on memory card
Image storage mode IR/visual images. Visual image can automatically be associated with corresponding IR image.
File formats Standard JPEG, 14 bit measurement data included
GPS Location data automatically added to every image from built-in GPS
Video recording and streaming
Radiometric IR-video recording 15 Hz direct to memory card
Non radiometric IR-video recording MPEG4 (up to 60 minutes/clip) to memory card. Visual image can automatically be associated with corresponding recording of non radiometric IR-video.
Digital camera video recording MPEG4 (25 minutes/clip) to memory card
Non radiometric IR-video streaming RTP/MPEG4
Digital camera
Built-in digital camera 3.2 Mpixel, auto focus, and two video lamps
Laser pointer
Laser Activated by dedicated button
Data communication interfaces
WLAN Peer to peer (adhoc) for iOS or infrastructure (network) for Android
USB USB-A: Connect external USB device (e.g. memory stick)
USB Mini-B: Data transfer to and from PC
USB, standard USB Mini-B: 2.0 High Speed
Video Digital Video output (image)
Power system
Battery type Rechargeable Li Ion battery
Battery voltage 7.2 V
Battery operating time > 3 hours at 25°C and typical use
Charging system In camera (AC adapter or 12 V from a vehicle) or 2-bay charger
Start-up time Typically 7 min. @ 25°C
Environmental data
Operating temperature range –20°C to +50°C
Storage temperature range –30°C to +60°C
Humidity (operating and storage) IEC 68-2-30/24 h 95% relative humidity +25°C to +40°C (2 cycl)
EMC EN61000-6-4 (Emission)
EN61000-6-2 (Immunity)
FCC 47 CFR Part 15 class A (Emission)
EN 61 000-4-8, L5
Encapsulation IP 54 (IEC 60529)
Bump 25 g (IEC 60068-2-29)
Vibration 2 g (IEC 60068-2-6)
Physical data
Camera weight, incl. lens and battery 2,48 kg
Battery weight 0,24 kg
Cameras size, incl. lens (L × W × H) 305 × 169 × 161 mm
Tripod mounting Standard, 1/4"-20
Housing material Aluminium, Magnesium
Grip material TPE Thermoplastic Elastomers
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Features Imaging and optical data Field of view (FOV) / Minimum focus distance 14.5º lens: 14.5° x 10.8° / 0.5 m 24º lens: 24º x 18º / 0.3 m F-number 1.5 Thermal sensitivity/NETD <15 mK @ +30°C Focus Automatic (one touch) or manual (elec..
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