Gas Find IR


Model: FLIR GF77 25° LR (7-8.5 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.

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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, and 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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Detector Type
Uncooled microbolometer
Detects Following Gases
Methane, nitrous oxide, propane, sulfur dioxide, R-134a and R-152a
Standard Temperature Range
Range 1: -20 to 80°C (-4 to 158°F)
Weight [incl lens & batteries]
1.54 kg (3.4 lb) w/ 25° lens
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)
Connections & Communications
USB 2.0, Bluetooth®, Wi-Fi, DisplayPort
Storage Media
Removable SD card
Ambient temperature range
–15°C to 50°C (5°F to 122°F)
IP 54 (IEC 60529)
Standard, 1/4"-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
6° LR, 25° HR, 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)
Frame Rate [Full Window]
30 Hz
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 streaming
H.264, MPEG-4 over RTSP over Wi-Fi; MJPEG over UVC or Wi-Fi
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 to 8.5 µm
Thermal Sensitivity/NETD
<25 mK at 30°C (86°F)
Non-Radiometric IR Video
H.264 to memory card
On Camera Display
640 × 480 pixel (QVGA) 4" touchscreen LCD with auto-rotation
Visual Image
5 MP visible camera with LED light
Visual Video Streaming
Gas Sensitivity [NECL]
CH₄: <100 ppm × m; N₂O: <75 ppm× m; CH₈: <400 ppm × m; SO₂: <30 ppm × m; R-134a: <20 ppm × m; R-152a: <100 ppm × m
(ΔT = 10°C, Distance = 1 m)
Measurement & Analysis
≤100 °C ± 3°C, >100°C ±3% for ambient temperature 15 to 35°C (59 to 95°F)
Bluetooth + EDR/LE: < 10 dBm WLAN: < 17 dBm
Infrared Resolution
320 × 240 pixels
Laser Distance Meter Information
Physical Features
Weight [including battery]
1.4 kg (3.1 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
Storage Media
Image File Format
Standard JPEG, measurement data included. Infrared-only mode
Related Documents
Export Restrictions

Export Restrictions

The information contained in this page pertains to a dual use product controlled for export by the Export Administration Regulations (EAR). Diversion contrary to US law is prohibited. US Department of Commerce authorization is not required prior to export or transfer to foreign persons or parties unless otherwise prohibited.

FLIR GF77 - Model: FLIR GF77 25° LR (7-8.5 µm)

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