Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1991-04-16
1992-09-08
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250345, 250352, 128719, G01N 2161
Patent
active
051460920
ABSTRACT:
A transducer for nondispersive infrared gas analysis has heaters for the data and reference detectors to maintain the detectors at a selected temperature. A heater is also provided to heat the casing of an airway adapter associated with the transducer to a temperature high enough to keep condensation from forming. The detector unit is surrounded and electrostatically shielded by a boxlike component with barndoor extensions which are closed to shield the installed detector unit at that end of the shield through which the detector unit is installed. The detector unit, electrostatic shield, and a circuit board which carries power supply and preamplifier circuits are installed in the transducer housing which has separate end closures sealed thereto with a through fastener and internal guides for locating the shielded detector unit in the housing.
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Apperson Jerry R.
Bang Gary M.
Knodle Daniel W.
Labuda Lawrence L.
Russell James T.
Fields Carolyn E.
NTC Technology Inc.
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