Compact carbon monoxide sensor utilizing a confocal optical cavity.The carbon monoxide sensor discussed in this paper utilizes a unique confocal cavity which allows the complete system to be packaged in a small volume suitable for hand-held use. The optical system is the heart of the instrument with equal emphasis placed on the electronics support circuitry, consisting essentially of a thermal infrared pyroelectric detector and lock-in amplifier. The pyroelectric detector offers a major advantage over other thermal detectors, providing a signal-to-noise ratio and detectivity that remain nearly constant over the frequency range from dc to 2000 Hz. Since bias voltage is not required, low frequency noise is not generated in the detector.
Document ID
19730053174
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Scott, B.
Magyar, J.
Weyant, R. (Perkin-Elmer Corp. Pomona, Calif., United States)
Hall, J. (Perkin-Elmer Corp. Costa Mesa, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
July 1, 1973
Subject Category
Biotechnology
Report/Patent Number
ASME PAPER 73-ENAS-20
Meeting Information
Meeting: Intersociety Conference on Environmental Systems