MICROSENSOR SYSTEMS, INCORPORATED

(MSI-301A Vapor Monitor)

TECHNOLOGY DESCRIPTION:

The MSI-301A vapor monitor is a portable, temperature-controlled gas chromatograph with a highly selective surface acoustic wave detector and an on-board computer (see photograph below). The MSI-301A vapor monitor performs the following functions:

• Preconcentrates samples and uses scrubbed ambient air as a carrier gas
• Analyzes a limited group of preselected compounds, such as benzene, toluene, and xylenes, at part per billion levels
• Operates by battery and includes an RS-232 interface
• Operates automatically as a stationary sampler or manually as a mobile unit

MSI-301A Vapor Monitor

WASTE APPLICABILITY:

The MSI-301A vapor monitor can monitor many volatile organic compound emissions from hazardous waste sites and other sources before and during remediation.

STATUS:

In January 1992, the MSI-301A vapor monitor was evaluated in the field at a Superfund site. Results from the demonstration are presented in a peer-reviewed article entitled "Evaluation of Portable Gas Chromatographs" in the Proceedings of the 1993 U.S. EPA/Air and Waste Management Association International Symposium, VIP-33, Volume 2, 1993.

FOR FURTHER INFORMATION:

EPA PROJECT MANAGER:
Richard Berkley
U.S. EPA
National Exposure Research Laboratory
MD-44
Research Triangle Park, NC 27711
919-541-2439
Fax: 919-541-3527

TECHNOLOGY DEVELOPER CONTACT:
Norman Davis
Microsensor Systems, Incorporated
62 Corporate Court
Bowling Green, KY 42103
502-745-0099
Fax: 502-745-1168