Gas Find IR


Model: FLIR GF77 25° LR (7-8.5 µm)
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FLIR GF77 is the first uncooled infrared camera from FLIR to visualize methane emissions in realtime for faster, more efficient gas leak surveys. This nimble, affordable alternative to FLIR’s industry-leading cooled optical gas imagers was designed for use by renewable energy producers, at natural gas power plants, and at locations along the natural gas supply chain.

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The Groundbreaking, Affordable OGI Camera

  • Spectral Filtering for Methane

    By filtering for methane and similar gases, the GF77 improves detection while also reducing false negatives from gases that absorb in other wavelengths.

  • Robust Camera Features

    From laser-assisted autofocus to 1-Touch Level/Span contrast enhancement, the GF77 offers the latest high-tech features you’d expect from FLIR.

  • Designed for Your Workday

    Designed with a 180° rotating optical block and an eyepiece viewfinder for all-day use, and packed with reporting features that help you organize your findings in the field.

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
Field of view (FOV)
25° x 19°
IR Resolution
320 × 240 (76,800 pixels)
Standard Temperature Range
Range 1: -20 to 80°C (-4 to 158°F)
Thermal Sensitivity/NETD
<25 mK at 30°C (86°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
Focal Length
18 mm (0.71 in)
Frame Rate [Full Window]
30 Hz
Image Frequency
30 Hz
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
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; C₃H₈: <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 Content
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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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