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Gas Find IR


Model: FLIR GF77 25° HR (9.5-12 µm) Go to Product Support
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The FLIR GF77 is a groundbreaking uncooled optical gas imaging camera with interchangeable lens options that detect methane, sulfur hexafluoride (SF6), ethylene, ammonia, and other gas emissions. Capable of both gas detection and radiometric temperature measurement for thermal inspections, the GF77 is ideal for electric power utilities, oil and natural gas operations, chemical/manufacturing facilities, the food and agriculture industry, and first responders. This affordable solution offers the benefit of built-in thermographic calibrations and the flexibility to detect a wide range of gases by simply changing lenses. The purchase of a GF77 camera includes a 3-month subscription to FLIR Thermal Studio Pro.

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A Versatile Solution for Gas Detection and Thermal Inspection

  • Maximize Efficiency

    Safely locate gas leaks and perform accurate thermal inspections using one camera.

  • Affordable Optical Gas Imaging

    From laser-assisted autofocus to 1-Touch Level/Span contrast enhancement, the GF77 offers the latest high-tech features while remaining affordable.

  • Streamline Inspections and Reporting

    Work easier with the ergonomic design, tools to organize findings in the field such as GPS, Wi-Fi, and annotation, plus rapid-reporting capabilities.

Improve Gas Detection

Improve Gas Detection

Improve image clarity and gas detection with advanced features from FLIR. The GF77 is calibrated for temperature, so you can manually adjust contrast between the gas cloud and the background. Or, increase contrast instantly with the 1-Touch Level/Span auto-adjustment feature. Finally, accentuate plume movement with FLIR High Sensitivity Mode (HSM).

FLIR Ignite™


Improve your team's efficiency and capabilities with the FLIR Ignite cloud solution. Directly upload, organize, and share images from your Wi-Fi connected FLIR camera. Keep your data safe in one place and easily accessible from any device.

thermal-studio-pro-Exseries.pngProfessional Reports that Help Your Customer and Your Business

The right image analysis and reporting software can greatly improve your business by making it easier for you and your customers to understand the problem and feel confident that you fixed it.

The advanced analysis and decision-making support offered in FLIR Thermal Studio Pro includes a rich set of measurement tools, batch processing, the ability to pre-plan inspection routes, and customized report templates.


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Never Worry About Your Camera Performance Again  

Keep your camera going strong with FLIR CARE and FLIR PROTECT. FLIR CARE provides world-class calibration with performance verification and traceable calibration adjustment services that ensure your thermal data is always accurate. FLIR PROTECT extended warranty and service packages provide a full three years of coverage beyond the respective camera’s factory warranty. FLIR PROTECT customers can also receive a bundled calibration service, discounts on additional services, and options for fast-delivered loaner cameras.

Learn More


ITC_Logo_Primary.pngBecome a Thermal Studio Expert

Learn to edit images, analyze them, and produce custom reports using FLIR Thermal Studio Suite software with online training from the Infrared Training Center. This virtual class covers everything you need to know, including: 

  • How to adjust image parameters and optimize thermal contrast
  • How to create batch functions for image processing
  • How to design a new report template

Thermal Studio Training 


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Want more information on this product?

Call +1 (866) 477-3687 to speak with a knowledgeable specialist.

IR Resolution
320 × 240 (76,800 pixels)
Gas Sensitivity [NECL]
SF6: <1 ppm × m, C₂H₄: <20 ppm × m, NH₃: <20 ppm × m, R-12: <4 ppm × m
(ΔT = 10°C, Distance = 1 m)
Detector Pitch
25 µm
≤100 °C ± 3°C (±5.4°F), >100°C ±3% for ambient temperature 15 to 35°C (59 to 95°F)
Spectral Range
9.5 to 12 µm
Imaging & Optical
Available Lenses
25° LR, 6° LR, and 6° HR (service calibration required)
Detector Pitch
25 µm
Detector Type
Uncooled microbolometer
Digital Zoom
1–6× continuous
Field of view (FOV)
25° x 19°
Focal Length
18 mm (0.71 in)
Gas Sensitivity [NECL]
SF6: <1 ppm × m, C₂H₄: <20 ppm × m, NH₃: <20 ppm × m, R-12: <4 ppm × m
(ΔT = 10°C, Distance = 1 m)
Image Frequency
30 Hz
Infrared Resolution
320 × 240 pixels
IR Resolution
320 × 240 (76,800 pixels)
Minimum Focus Distance
0.3 m (0.98 ft)
Minimum Focus Distance with MSX
0.65 m (2.1 ft)
Non-radiometric IR video recording
H.264 to memory card
Non-radiometric IR video streaming
H.264, MPEG-4 over RTSP over Wi-Fi; MJPEG over UVC or Wi-Fi
On Camera Display
640 × 480 pixel (QVGA) 4" touchscreen LCD with auto-rotation
Radiometric IR video recording
Real-time radiometric recording (.csq)
Radiometric IR video streaming
Compressed, over UVC
Spatial resolution (IFOV)
1.4 mrad/pixel
Spectral Range
9.5 to 12 µm
Thermal Sensitivity/NETD
<25 mK at 30°C (86°F)
Measurement & Analysis
≤100 °C ± 3°C (±5.4°F), >100°C ±3% for ambient temperature 15 to 35°C (59 to 95°F)
Object Temperature Range
Range 1: -20° to 80°C (-4° to 176°F), Range 2: 0° to 250°C (32° to 482°F), Range 3: 100° to 500°C (212° to 932°F)
Communication & Data Storage
Image File Format
Standard JPEG, measurement data included. Infrared-only mode
USB 2.0, Bluetooth®, Wi-Fi, DisplayPort
Storage Media
Removable SD card
Size [L × W × H]
Lens vertical: 150.5 × 201.3 × 84.1 mm (5.9 × 7.9 × 3.3 in), Lens horizontal: 150.5 × 201.3 × 167.3 mm (5.9 × 7.9 × 6.6 in)
Weight [incl lens & batteries]
1.54 kg (3.4 lb)
Battery operating time
>4 hours at 25°C (68°F) with typical use
Battery Type
Rechargeable Li-ion battery
Battery voltage
3.6 V
Environmental & Certifications
IP 54 (IEC 60529)
UNC ¼″-20
Operating Temperature Range
-15 to 50°C (5 to 122°F)
Shock & Vibration
25 g (IEC 60068-2-27) / 2 g (IEC 60068-2-6)
Storage Temperature Range
-40 to 70°C (-40 to 158°F)
Media gallery
Natural Gas Leak | FLIR GF77 Sample Footage
Natural Gas Leak | FLIR GF77 Sample Footage
Related Documents
Export Restrictions

Export Restrictions

The information contained in this page pertains to products that may be subject to the International Traffic in Arms Regulations (ITAR) (22 C.F.R. Sections 120-130) or the Export Administration Regulations (EAR) (15 C.F.R. Sections 730-774) depending upon specifications for the final product; jurisdiction and classification will be provided upon request.

FLIR GF77 - Model: FLIR GF77 25° HR (9.5-12 µm)

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