Ours laser sensors, entire constructed in ours laboratories, allow a real time monitoring of "light" gasses concentration in air, such as CO, CO2 , NOx , HCl, HF, CH4, NH3 , H2S, C2H2 , O2.
With a sensitivity up to 100 ppb/m and temporal response below 1 second, ours instruments find a lot of possible applications in the scientific
domain as well as in the industrial one. 
Designed to increase the sensitivity of systems based on absorption spectroscopy, the Herriot multipass cells produced by SIT allow to set up very long optical paths (10-100 meters), with limited linear dimensions (about 20-50 centimeters) and reduced volume.
SIT designs and produces all the electronics equipping its laser sensors. During the several years of our activity in gas surveying, we developed increasingly compact, versatile, and multi-functional cards for laser-diode systems control. These cards, which we present hereafter, can be individually commercialized, and can be used in other systems than our analyzers.
