Air temperature sensor

Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor

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Details

374138, 374148, 338 28, 338 22R, G01K 722, G01K 1302, G01K 108

Patent

active

054492343

ABSTRACT:
The present invention provides an apparatus for sensing the temperature of surrounding air. The apparatus is thermally isolated from the external environment and more accurately provides an indication of the medium temperature while providing fast response. The apparatus includes a temperature sensing device whose resistance varies with temperature and a conditioning circuit for measuring the resistance and producing an electrical signal which is insensitive to external resistive loading and which has a magnitude responsive to the sensed resistance. The apparatus includes a non-metallic housing which encapsulates the temperature sensitive device and the conditioning circuit. The housing forms a cage portion which surrounds the temperature sensing device and is adapted to protect and to provide air flow to the temperature sensing device.

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