Gas Find IR


Model: FLIR GF77 25° HR (9.5-12 µm)
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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. For a limited time, the purchase of a GF77 camera includes a 3-month subscription to FLIR Thermal Studio Pro and FLIR Route Creator.

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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).

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Call 01732 220011 to speak with a knowledgeable specialist.

Detector Type
Uncooled microbolometer
Detects Following Gases
Sulfur hexafluoride, ammonia, ethylene
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)
Connections & Communications
USB 2.0, Bluetooth®, Wi-Fi, DisplayPort
Storage Media
Removable SD card
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)
Imaging & Optical
Available Lenses
25° LR, 6° LR, and 6° HR (service calibration required)
Detector Pitch
25 µm
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, NH: <20 ppm × m, R-12: <4 ppm × m
(ΔT = 10°C, Distance = 1 m)
Image Frequency
30 Hz
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
7-8.5 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)
Battery charger size [L x W x H]
59 × 66 × 94 mm (2.3 × 2.6 × 3.7 in)
Bluetooth + EDR/LE: < 10 dBm WLAN: < 17 dBm
Infrared Resolution
320 × 240 pixels
Laser Distance Meter Information
Operating Frequency
Bluetooth + EDR/LE: 2402-2480 MHz WLAN 2.4 GHz: 2412-2462 MHz WLAN 5 GHz: 5150-5350 MHz (DFS: only slave mode) Note that frequency band 5150-5350 MHz is for indoor use only, see national regulations.
Battery operating time
>4 hours at 25°C (68°F) with typical use
Battery type
Rechargeable Li-ion battery
Battery voltage
3.6 V
Storage Media
Image File Format
Standard JPEG, measurement data included. Infrared-only mode
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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