Gas analyser models
OPSIS offers several gas analyser models. Most of them are based on optical measurement methods and most of them are capable of monitoring two or more different gaseous compounds using the same gas analyser unit. Which type of OPSIS gas analyser will be best for your application? No matter what gas monitoring need you have, OPSIS has the gas analyser to fulfil that need.
UV-DOAS
The first type of OPSIS gas analyser developed was the UV-DOAS instrument. This is still the predominant type of gas analyser being applied both for ambient air quality monitoring (AQM), continuous emissions monitoring (CEM), and process control applications.
The UV-DOAS instrument covers most needs for gas concentration measurements in AQM applications. Here, you rarely need another type of gas analyser. You get superb monitoring performance for multiple gases using a single analyser.
FTIR-DOAS
A UV-DOAS instrument can also measure several gaseous compounds of typical interest in CEM and process control applications, and it may give you all you need there too. However, here it is more common to find measurement requirements also calling for a different type of gas analyser: the FTIR-DOAS instrument. It gives just as superb measurement performance on “IR gases” (utilizing light absorption by the gaseous molecules in the infrared wavelengths) as the UV-DOAS gives on “UV gases” (molecules with absorption in the ultraviolet wavelength range). By combining a UV- and an FTIR-DOAS instrument, you get optimum performance for both UV gases and IR gases.
TDL
As an alternative to the DOAS instruments, OPSIS also offers a type of gas analyser based on tuneable diode lasers (TDLs). The instrument is mostly used in process control applications. Its performance is comparable to the UV- and FTIR-DOAS instruments, but it is often more cost efficient when measuring only one or a few gases in two or more monitoring locations.
Zirconium Dioxide
The OPSIS oxygen monitor differs from the other types of gas analysers. It is a single-gas (i.e. oxygen) analyser only, based on a zirconia cell. It provides a very cost-efficient supplement to the other types of gas analysers, but it can also be used stand-alone on its own merits.
TESTED AND APPROVED
The OPSIS range of gas analysers have been tested and certified by a number of internationally recognized institutes and authorities, such as U.S. EPA, German TÜV, and under British MCERTS standards.
