Humidity and/or temperature control device

Details Humidity and/or temperature control device Humidity and/or temperature control device

1995-05-23

1996-11-26

Williams, Hezron E.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73 2902, 307 34, 307116, 62209, 62214, 219494, 236 44, H02H 300, F24F 600, B01F 302, G01W 100

Patent

active

055787533

ABSTRACT:
A humidity control device includes a microcontroller, a variable impedance humidity sensing circuit and a zero crossing detector circuit. The humidity sensing circuit and zero crossing circuit are provided with an AC line voltage and both have outputs which are provided to the microcontroller. The humidity control device also includes a semiconductor switch circuit which switches the AC line voltage to an external electrical device, such as a dehumidifier or heater, at the zero crossing.

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