Thermal Sensitivity in OGI (Optical Gas Imaging) Cameras

Biogas Gas Detection

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Optical Gas Imaging (OGI) cameras use pixel detectors that sense tiny infrared energy changes, thus allowing for easy visualization of gas plumes. That’s why OGI cameras like Opgal’s EyeCGas 2.0 are an excellent way to detect small to large gas leaks. Even as far as 10 miles (16Km) away.

Why do we need to understand the meaning of thermal sensitivity in an OGI camera? It’s elementary; the term sensitivity in OGI technology refers to the ability of the camera to detect small leaks, in addition to leaks from a far distance.

Large leaks are costly and more of environmental concern. However, regularly during routine LDAR surveys, we are looking for smaller leaks as well.

In 2015, the EPA (Environmental Protection Agency) conducted tests using the different OGI cameras in the market and reported that Opgal’s EyeCGas was the most successful in detecting and identifying leaks. In addition, the report concluded that the EyeCGas could detect the lowest concentrations (CH₄ @ 0.35 grams per hour).

Opgal’s EyeCGas 2.0 has different modes. If you are trying to see small leaks (both from close up and from a distance), then by going through its 11 enhancement processing modes, you can set the camera’s thermal sensitivity level to its lowest. The image processing of the enhancement mode provides a slightly grainy image, but the special algorithm enhances the visualization of the gas plume.

This video demonstrates the EyeCGas 2.0 detecting methane and going through the different enhanced modes and how it improves the visibility of the plume.