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HCl + H2O Monitoring

Hydrogen Chloride (HCl) is a colorless (sometimes slightly yellow) gas with a distinctive acidic odor. This gas is an undesired environmental pollutant that is damaging to both human and environmental health, even in minute quantities (ppmv levels). Exposure limits have been established for industries to ensure that workers operate in a safe environment. Monitoring of HCl is essential for coal-fired power plants and incinerators as well as for the aluminum recycling and cement industries. 


Our TDLAS technology ensures accurate and rapid response to HCl levels in a variety of harsh environments. Water (H2O) concentrations are also measured with our HCl analyzer for calibration of the instrument and to ensure proper functioning. For compliance requirements, our analyzers can incorporate a flowthrough audit cell for routine monitoring of instrument response. We offer single- and two-point monitoring systems. The Unisearch LasIR provides:

  • Reliable, accurate data
  • Rapid response – within seconds if desired
  • Continuous emissions monitoring
  • Freedom from interferences from other gases which could result in erroneous data
  • Easy maintenance and improved process control
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