Each sensor system contains laser beam launching and receiving elements. All Unisearch LasIR systems have a common control module. The module contains the thermoelectrically cooled diode laser, the radio frequency modulation circuitry, detectors, and data acquisition and control electronics. An on-board computer provides automatic operation and signal analysis. They are being used for in-situ monitoring of stack and duct emissions, and for open path remote sensing of fugitive emissions and perimeter monitoring.
Systems are also in place for point source extractive measurements.
One of the applications is for HF measurement in the aluminum smelting industry. Alcan uses LasIR configurations for process control and also pre and post scrubber stack measurements. Other current LasIR applications measure HF, HCl, NH3, and H2S for semiconductor industries, specialty gases, power generation, landfills, oil refineries, and others. Presently most of the vehicles in urban Texas have had their emission monitored by a LasIR system. Ford Motor Co. has used the LasIR-R for measuring the relative concentrations of CO and CO2.