Humidity detecting apparatus

Details Humidity detecting apparatus Humidity detecting apparatus

G - Physics

08

B

340/139

G08B 21/00 (2006.01) G01N 27/12 (2006.01) G01N 33/00 (2006.01)

Patent

CA 1149485

HUMIDITY DETECTING APPARATUS Abstract of the Disclosure This invention is directed to an apparatus capable of stably detecting humidity. More particularly, to stably detect the humidity in the atmosphere where tem- perature, relative humidity or wind flow vary. The humidity detecting apparatus converts the resistance variation, due to humidity, of a humidity-sensing resistor into voltage variations to draw out the voltage variations, thereby to differentiate the voltage variation with a differentiation circuit and thereafter to compare the differentiation output with a set value. Therefore, steam leakage from a high pressure, high temperature steam supply pipe or the relative humidity inside a microwave oven can be easily, automatically detected. The apparatus is quite simple in design and construction and can be manufactured quite inexpensively.

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