Photometric gas analysis
Tunable Diode Laser
The TDL system consists of a laser light source, transmitting optics, an optically accessible absorbing medium, receiving optics, and detector. It uses a single-line“ monochromatic” spectroscopy technique that offers highly stable calibration, a continuous, fast, in-situ measurement, and the avoidance of cross-interference from other gases.
Infrared
Our photometric gas analyzers use non-contact, light-based sensing to measure gas concentrations in a mixture. They are powered by our Tunable Diode
Laser( TDL), Infrared, and Gas Filter Correlation( GFC) sensing technologies.
Infrared( IR) sensors focus an IR light source through a sample cell – which holds a continuously flowing sample of the gas mixture – and onto a detector. The property of some gases to absorb unique light wavelengths can be used to detect the concentration of a selected gas in a mixture.
Gas Filter Correlation
GFC sensing is a further development of the photometric analysis used in our Infrared technologies, performing well when highly accurate, low-level measurements are needed, or in applications where the measurement may be affected by background gases. 6