QOGI stands for Quantitative Optical Gas Imaging and is the latest technology related to Leaking Detection And Repair (LDAR). QOGI uses FLIR's existing OGI cameras (the GF320, GFx320 and GF620) to quantify hydrocarbon gas leaks.
FLIR QOGI Solutions
The FLIR QL320 is the latest platform to run the advanced QOGI method to easily quantify gas leakage in units of mass leak rate, volumetric leak rate or by concentration length.
QOGI Triangle
To obtain a quantifiable image of a gas with an infrared camera requires three things. We describe this as the "QOGI triangle", similar to the "fire triangle", where fuel, oxygen and ignition are needed. These requirements are listed below:
- α(λ): Gas has an IR absorption peak that overlaps with spectral filter of the OGI chamber.
- ΔT: There is a sufficient temperature differential between the gas plume and the bottom.
- CL: There is sufficient gas concentration in the plume.
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