What is an open path gas detection system?
Open Path Gas Detection System is an optical device that analyzes a gas concentration along a line-of -sight between a light source and a detector over a distance of up to several hundred meters. The system comprises two units that are located at a predetermined distance or collocated when a retro-reflector is used. The radiation intensity emitted by the light source is detected by the detector and is related to the concentration of the chemical substance in the optical path measured by the system. Such systems are using either IR or UV spectral sensors in the detection unit and detect gases at very low concentrations in air, PPM (Part Per Million) or LEL levels.
