SYSTEME TERRESTRE MOBILE DE DETECTION DE GAZ DANS L'AIR ET DISPOSITIF DE DETECTION ASSOCIE

The gas detector (20) consists of a fixed emitter (21) producing an optical, e.g. infrared, beam and a fixed receiver (22) that receives it after it has passed along a given track (23), and a means of detecting and calculating the amounts of gases present in the air. The emitter and receiver are mounted on the back of a motor vehicle (10), e.g. on a trailer hitch, together with a plastic deflector (30) to direct the gases between them. A suction unit can be incorporated to accelerate the movement of the gas flow across the emitter beam, and the vehicle also has an exhaust pipe attachment to direct exhaust gases away from the detector.