Measuring and testing – Moisture content or absorption characteristic of material
Patent
1990-09-28
1992-09-01
Cuchlinski, Jr., William A.
Measuring and testing
Moisture content or absorption characteristic of material
136232, 374179, 374182, G01N 2556, G01K 710
Patent
active
051429012
ABSTRACT:
A specific heat based moisture sensor comprises: a cylindrical member formed with two parallel axially-extending hollow portions; a heater provided on an outer circumferential surface of the cylindrical member; a temperature sensor formed by leads passed through the two hollow portions of the cylindrical member; and a waterproof synthetic resin formed so as to cover said cylindrical member and the heater. Since the difference in distance between the heater and the temperature sensor lead is determined precisely, the sensing reliability can be improved. Since the ceramic cylindrical member is used, temperature sensitivity can be improved. Since the sensor is covered with a waterproof resin, it is possible to prevent metallic ions from entering the substance to be sensed, without increasing the size and cost of the moisture sensor.
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Ishiguro Yoshiaki
Nagawa Yoshiharu
Bennett G. Bradley
Cuchlinski Jr. William A.
Yazaki -Corporation
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