Improved H2S gas analyzer provides 1 ppbv sensitivity

 flue gas treatment Picarro, Inc. has introduced a new and improved analyzer formonitoring trace levels of H2S (hydrogen sulfide) in ambient air,with a lower detection limit of 1 ppbv that is an order ofmagnitude lower than earlier models. Based on the company's WS-CRDS(Wavelength-Scanned Cavity Ring Down Spectroscopy) technology, thenew Picarro G1104 H2S analyzer provides a very large dynamic range(up to 300 ppmv), operates in real time (seconds), and has norequirement for frequent calibration. Unlike H2S sensors based oncompetitive techniques, the G1104 H2S analyzer does not suffer fromcross-talk due to changes in other ambient gas components,including other trace sulfur compounds such as SO2 and COS, as wellas variations in moisture and CO2 at atmospheric levels. WS-CRDS is an ultrasensitive technology that measures the opticaldecay time in a flow cell using an internal laser beam with aneffective path length of many kilometers. This enables theconcentration of a particular species to be measured withsensitivity and precision several orders of magnitude higher thanby any other optical technique. This new H2S analyzer achieves itssuperior precision and accuracy because it incorporates improvedtemperature control of the internal optical components. StatesPicarro President and CEO Michael Woelk, "This improved H2Sperformance is testament to Picarro's commitment to continuedengineering to make better products that meet the changing and moredemanding regulatory requirements for ambient gas analysis." The new Picarro G1104 H2S analyzer is compact and rugged with nomoving parts, making it ideal for use in a wide range of sensingapplications, operating equally well as a remote unattended monitoror as a state-of-the-art laboratory instrument. Specificapplications include petrochemical plant emissions, in stacks,flares and flues, as well as emissions from landfills, sewagetreatment plants and wastewater facilities. Picarro, Inc. is a privately held company dedicated to developinginstrumentation for the highest sensitivity, precision and accuracymeasurements of specific molecules of interest in environmentalanalyses, process monitoring, and emissions control. The company isa leader in wavelength scanned cavity ring down spectroscopy(WS-CRDS) technology with eight exclusive licenses to StanfordUniversity patents and nine of its own on WS-CRDS extensions.