Improved H2S (Hydrogen Sulfide) Gas Analyzer Provides 1 ppbv Sensitivity

Jun 03, 2008, 01:00 ET from Picarro, Inc.

    SUNNYVALE, Calif., June 3 /PRNewswire/ -- Picarro, Inc. has introduced
 a new and improved analyzer for monitoring trace levels of H2S (hydrogen
 sulfide) in ambient air, with a lower detection limit of 1 ppbv that is an
 order of magnitude lower than earlier models. Based on the company's
 WS-CRDS (Wavelength-Scanned Cavity Ring Down Spectroscopy) technology, the
 new Picarro G1104 H2S analyzer provides a very large dynamic range (up to
 300 ppmv), operates in real time (seconds), and has no requirement for
 frequent calibration. Unlike H2S sensors based on competitive techniques,
 the G1104 H2S analyzer does not suffer from cross-talk due to changes in
 other ambient gas components, including other trace sulfur compounds such
 as SO2 and COS, as well as variations in moisture and CO2 at atmospheric
     WS-CRDS is an ultrasensitive technology that measures the optical decay
 time in a flow cell using an internal laser beam with an effective path
 length of many kilometers. This enables the concentration of a particular
 species to be measured with sensitivity and precision several orders of
 magnitude higher than by any other optical technique. This new H2S analyzer
 achieves its superior precision and accuracy because it incorporates
 improved temperature control of the internal optical components. States
 Picarro President and CEO Michael Woelk, "This improved H2S performance is
 testament to Picarro's commitment to continued engineering to make better
 products that meet the changing and more demanding regulatory requirements
 for ambient gas analysis."
     The new Picarro G1104 H2S analyzer is compact and rugged with no moving
 parts, making it ideal for use in a wide range of sensing applications,
 operating equally well as a remote unattended monitor or as a
 state-of-the-art laboratory instrument. Specific applications include
 petrochemical plant emissions, in stacks, flares and flues, as well as
 emissions from landfills, sewage treatment plants and wastewater
     Picarro, Inc. is a privately held company dedicated to developing
 instrumentation for the highest sensitivity, precision and accuracy
 measurements of specific molecules of interest in environmental analyses,
 process monitoring, and emissions control. The company is a leader in
 wavelength scanned cavity ring down spectroscopy (WS-CRDS) technology with
 eight exclusive licenses to Stanford University patents and nine of its own
 on WS-CRDS extensions. Visit us at
     Contact Information:
     Aaron Van Pelt, Marketing Engineer,, (408)

SOURCE Picarro, Inc.