Founded in 1980, UNISEARCH became a pioneer and, consequently, a world leader in the use of Tunable Diode Laser Absorption Spectroscopy (TDLAS) and (TDL) for air measurements - a position it still enjoys today.

 UNISEARCH is a team of people committed to mutual respect, professional conduct and a passion for excellence. Our worldwide network of sales representatives is complemented by a full staff of installation and service experts.

The company also maintains a strong R&D focus to retain its status as an industry leader, both for its current products and for its development of new product lines.

In 1994, the company introduced its LasIR system of instruments, which extends our TDLAS technology to the use of telecommunication Tunable Diode Lasers. Applications for LasIR instruments include air quality measurements, fence-line monitoring, CEM (continuous emission monitoring) and process control. Systems have been installed around the world.

In the early ’90s, the company developed an improved Differential Optical Absorption Spectrometer (DOAS) system and, in 1995, licensed the technology to Thermo Environmental Instruments.

Also in 1995, UNISEARCH acquired advanced Fourier Transform Infrared (FTIR) technology and opened its Austin, Texas, plant to manufacture FTIR instruments. Since then, the company has developed and installed a number of FTIR systems, used mainly for fence-line monitoring and extractive continuous emission monitoring and process control.

Prior to the acquisition of FTIR, UNISEARCH developed its patented LUMINOx® line of instruments. Based on a novel surface-chemiluminescence technique, these lightweight, battery-operated instruments are highly sensitive and detect NO2, NO, NOy, O3 and PAN.