FLIR GF309 Furnace and Electrical Inspection Camera

  • Temperature range of -40˚C to 1500˚C with 25mK thermal sensitivity
  • Features removable contoured heat shield for advanced user safety
  • See through the flames with special built-in midwave "flame filter"
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No Longer Available

FLIR GF309 Furnace and Electrical Inspection Camera

The FLIR GF309 Furnace and Electrical Inspection Camera is specifically designed for potentially hazardous, high-temperature industrial furnace applications. Custom-built to see through flames during furnace or boiler inspections, this FLIR camera comes with a special mid-wave 'flame filter' for temperatures up to 1500˚C. With a temperature range between -40 and 1500˚C, the GF309 boasts an impressive accuracy of ±1°C, an IR resolution of 320 × 240 pixels and an excellent thermal sensitivity of <25 mK. Ideal for monitoring furnaces, heaters and boilers such as those in the chemical, petrochemical, and utility industries, the FLIR GF309's exceptional temperature range is also perfectly suited for high-accuracy electrical and mechanical inspections.

Visualising gas leaks in real-time the FLIR GF309 Inspection Camera provides increased protection with a detachable heat shield. Contoured to improve worker safety and comfort, the removable shield reflects heat away from both the camera and the operator. Outstanding accuracy combined with temperature measurements from across the entire surface of gas-fired furnaces, chemical heaters and coal-fired boilers results in a process which is quick, easy and most importantly safe. This dual-use camera, for both furnace and ambient temperatures, produces infrared images which show isolated areas of specific tubes currently overheating and not being detected by the temperature thermocouple. Typically, this can result in a localised tube failure and cause an unnecessary facility shutdown.

A high-performance tiltable LCD viewfinder is incorporated within the FLIR GF309 Furnace and Electrical Inspection Camera, delivering bright and vivid imagery with high contrast even in poor lighting or under direct sunlight. With flip-out functionality, this 4.3-inch colour display includes a 1-8x continuous digital zoom and 800 x 400 pixels. Capture both radiometric and non-radiometric IR-video before enhancing findings with features such as manual level & span adjustment and emissivity correction. The built-in 3.2-megapixel digital camera includes autofocus capabilities, two video lamps and a laser pointer.

Save images and video from the FLIR GF309 to any off-the-shelf video recorder for easy archiving and documentation. Use an SDHC card, or the supplied removable 2 GB SD card, in one of the GF309's two card slots and store up to 5000 JPEG images with post-process capability. Embedded with GPS data, digital images can be used to precisely locate inspected areas and are completely compatible with FLIR QuickReport and FLIR Reporter software when creating professional inspection reports. Ergonomically designed with a rotating handle and direct access buttons, the camera includes ports for standard USB, USB-A & USB Mini-B connections. Avoid unscheduled shutdowns or catastrophic failures with this IP54-rated IR inspection camera featuring a battery life capable of 3 hours of continuous observation.

Choice of Lens

Select your choice of lens for the FLIR GF309 Furnace and Electrical Inspection Camera from the drop-down menu above.

  Field of View (FOV) Min. Focus Distance
FLIR GF309 24° 24° x 18° 0.3 m
FLIR GF309 14° 14.5° × 10.8° 0.5 m

Key Features

  • Designed for high-temperature industrial furnaces
  • Ideal for chemical, petrochemical, and utility industries
  • Can perform accurate electrical and mechanical inspections
  • Choice of lens - 24˚ or 14˚
  • 'Flame Filter' helps see through the flames
  • Measure the entire surface of gas-fired furnaces, chemical heaters & coal-fired boilers
  • Temperature range of -40 to 1500˚C
  • Includes accuracy of ±1°C
  • 320 × 240 pixels IR resolution
  • Thermal Sensitivity of <25 mK
  • Visualise gas leaks in real-time
  • Incorporate detachable heat-shield
  • Dual-use camera for furnace & ambient temperatures
  • Infrared images pinpoint overheating tubes
  • Flip-out LCD tiltable viewfinder
  • 4.3-inch display with high contrast, full colour and 800 x 400 pixels
  • Features 1-8x continuous digital zoom
  • Manual level & span adjustments available
  • Emissivity correction function
  • 3.2-megapixel digital camera with autofocus
  • Two video lamps include
  • Laser pointer feature
  • Capture both radiometric and non-radiometric IR-video
  • Compatible with removable SD & SDHC memory cards
  • Two card slots built-in
  • Save up to 5000 JPEG images with post-process capability
  • Embed images with GPS data
  • Stored data compatible with FLIR QuickReport and FLIR Reporter software
  • Ergonomic, intuitive design
  • USB, USB-A & USB Mini-B ports available
  • IP54 rated for a high level of safety
  • 3-hour battery life at 25°C and during typical use
  • Furnace IR lens extender (Sold Separately)

FLIR part number: GF309

What's In The Box?

  • FLIR GF309 Infrared camera
  • Choice of Lens
  • Heat shield
  • Shipping case
  • Lens cap (mounted on lens)
  • Lens cap
  • Lens cap strap
  • Shoulder strap
  • 2 x Batteries
  • Charger
  • Power supply
  • Power supply cord
  • HDMI cable
  • USB cable
  • SD card
  • SD card adapter (connects via USB to PC)
  • Getting Started Guide (printed)
  • Manual for GF-series on CD
  • FLIR Quick report on CD
  • System Calibration Certificate
  • Lens Cleaning Cloth

Imaging and optical data

  • Field of view (FOV): 14.5° × 10.8° or 24° × 18°
  • Minimum focus distance: 0.5 m (1.64 ft.) or 0.3 m (1.0 ft.)
  • Lens identification: Automatic
  • F-number: 1.5
  • Thermal sensitivity/NETD: <25 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, scene based NUC
  • Focal Plane Array (FPA): Cooled InSb
  • Spectral range: 3 – 5 μm
  • IR resolution: 320 × 240 pixels
  • Detector pitch: 30 μm
  • 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: –40 to +1500°C
  • Accuracy:
    ±1°C for temperature range
    ±2% of reading for temperature range

Measurement analysis

  • Spotmeter: 3
  • Area: 1 box
  • 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
    Start/stop recording
    Store image
    Playback/recall image
  • Set-up commands: Local adaptation of units, language, date and time formats
  • Web interface: Admin camera setup and viewing IR images

Storage of images

  • Image storage type: Removable SD or SDHC Memory Card, two card slots
  • Image storage capacity: > 5000 images (JPEG) with post process capability (4 GB SDHC card)
  • Image storage mode:
    IR/visual images
    Visual image is automatically 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: 7 Hz direct to memory card
  • Non radiometric IR-video recording: H.264 (60 minutes/clip) to memory card
  • Digital camera video recording: H.264 (25 minutes/clip) to memory card
  • Non radiometric IR-video streaming: H.264 and MPEG-4

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

  • USB:
    USB-A: Connect external USB device (e.g. memory stick)
    USB Mini-B: Data transfer to and from PC
  • USB, standard: USB 2.0 High Speed
  • Video: HDMI

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
  • Charging time: 2.5 h to 95% capacity, charging status indicated by LED's
  • External power operation:
    AC adapter 90–260 VAC, 50/60 Hz
    12 V from a vehicle (cable with standard plug, optional)
  • DC operation: 10.8 to 16V DC, Polarity protected (proprietary protected)
  • Power: 8 W typically
  • Start-up time: Stirling cool down: < 5 min. @ 25oC

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)
  • Directives:
    73/23EEC, 89/336/EEC
    2002/95/EC, 2002/96/EC
  • EMC:
    EN61000-6-3 (Emission)
    EN61000-6-2 (Immunity)
    FCC 47 CFR Part 15 class B (Emission)
    EN 61 000-4-8, L5
    EN/UL/CSA 60950-1
  • 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: 2.4 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