Uniphos Continuous Emission Monitoring Systems

The Uniphos CEMS is an online analyser for measuring concentration of various toxic gases in industrial process/ boiler stack. Being capable of Auto /remote calibration with digital communication, it provides a complete solution for stack monitoring.

Uniphos CEMS are available based on different technologies depending upon the suitability and users requirement:

•  Highly sensitive & gas specific Chemiluminescence / Fluorescence based NOX and SO2 Gas Analyzers
•  Non-Dispersive Infrared (NDIR) based Analyzers
•  Electrochemical sensor based analyzers

Chemiluminescence has long been recognized as the best practical analytical method for NOx detection at parts per billion level and with little or no interference from other pollutant gases. When nitric oxide reacts with ozone, nitrogen dioxide in the excited state is produced. These excited molecules return to ground state by emitting light in the region 600-2800nm which is measured using a Photomultiplier tube. The amount of light produced is proportional to the amount of nitric oxide in the sample. Hence the concentration of NO can be determined very accurately.

Measuring range: 0-100 / 0- 1000 / 0-2000 ppm
Resolution: 1 ppm

The Uniphos SO2 analyzer is based on UV fluorescence technique, which utilizes measurement of SO2 fluorescence typically in the range of 240-420 nm resulting from the optical excitation of SO2 molecules. The fluorescence intensity is related to SO2concentration. Suitable techniques are adopted to remove interference from moisture and hydrocarbons to make the analyzer highly specific for SO2 detection.

Measuring range: 0-100 / 0- 1000 / 0-2000 ppm
Resolution: 1 ppm

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