Thermistor having temperature detecting sections of substantially the same composition and dimensions for detecting subtantially identical temperature ranges
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United States of America Patent
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Feb 4, 1997
Grant Date -
N/A
app pub date -
Oct 14, 1994
filing date -
Oct 14, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A thermistor type temperature sensor having a substrate made from an electrically insulating ceramic plate. A thin or thick film detecting resistor is printed on the substratum. A thick or thin film pull-up resistor may also be printed on the substratum, and trimming of the resistors is possible. The ratio of B-constant values for the detecting resistor and the pull-up resistor may be selected so that it is locate between 0.4 to 0.9 or 1.1 to 1.5. The detecting resistor may be constructed from thermistor sections of the same composition and the sections may be connected in parallel or in series. The thermistor sensor can be connected to the pipe through which a gas passes. When the sensor is connected to the pipe, the angle of the measuring plane may be adjusted, so that a precise measurement can be obtained.
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