An SO2 analyzer is used to detect the presence of SO2 in the air using an optical detector and UV light. Most analyzers are able to store data over a long period of time to enable the user come up with a conclusive SO2 analysis. Detection of SO2 can be done regardless of temperature, pressure and other environmental factors that are likely to alter the final results. The instruments used are able to overcome such factors through an inbuilt compensation system. In addition to this, a reference detector and an optical cover are used to compensate for changes in the concentration of UV light and PMT drift. By the end of the process, all these parameters end up having a negligible effect on the final readings.

A display unit is used to display both internal and external parameters. These include temperature, humidity, pressure, light intensity, calibration used, and SO2 concentration. The data provided can either be instantaneous or average depending on the preference of the user. An SO2 analyzer stores data in a built in memory for future reference. This data can be accessed by an external device via the USB port or Ethernet port. It can also be accessed from the display panel and used for SO2 analysis.

Data analysis involves tracking of parametric trends and formulation of predictive diagnostics. A conclusive report is prepared from this information and handed in to the licensing authorities. Users should consider some factors before purchasing the SO2 analyzer. Such factors include ease of operation, versatility, portability, warranty period, multi-tasking features, storage, power consumption and adaptive filtering of signals. Some of the instruments are capable of using DC power. Therefore, they can be powered by AA or AAA sized batteries to improve on portability. Any instrument dealing with the detection of gases should be compliant with the rules and regulations set by the US EPA.    


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