TDL-1002: Standard High Sensitivity Sensor

Physical Sciences Inc. (PSI) produces standard versions of our popular research trace gas sensors. Based on tunable, room temperature diode laser technology, these models provide the most advanced electro-optic sensor technology in a reliable and automated package for virtually any application.

Features

• Sub-ppm detection capability
• All fiber laser light transport for remote detection
• Fully automated operation
• Windows users interface
• Continuous data reporting to 1 kHz
• Continuous analog and digital outputs as well as disk storage
• Variable UHV to 2 atm pressure range
• Portable 19 in. rack-mounted controller

Applications

• Contaminant monitoring in CVD
• Trace humidity in process flows
• Combustion/propulsion emissions
• Atmospheric monitoring

Example TDL-1002 linearity over 4 decades.

PSI's approach to trace gas detection uses reliable InGaAsP diode laser technology developed for the tele- communications industry and proprietary signal processing techniques to provide continuous, pressure- and temperature-compensated measurements of trace gases in process flows. The laser, detector, and control electronics are all housed in a portable 19-in rack-mounted assembly with only fiber and electric cable connections to the measurement locations. The low-power laser radiation is launched across a small open path and the net power absorbed by the water vapor in the beam path is separated from contributions from other gases, obscured optical surfaces, or particulates. A variety of standard and custom optical interfaces are available.

Detection limits below 1 ppm-meter - Dynamic range > 10³

Overview of Diode Laser Measurements in Large-Scale Test Facilities Diode Laser Sensor for Gasdynamic Measurements in a Model SCRAMJET Combustor Continuous Water Vapor Mass Flux and Temperature Measurements in a Model SCRAMJET Combustor Using a Diode Laser Sensor Diode Laser Absorption Sensors For Gas Dynamic and Combustion Flows

Mark G. Allen Physical Sciences Inc. 20 New England Business Center Andover, MA 01810-1077 Telephone: (978) 689-0003 Fax: (978) 689-3232 allen@psicorp.com