🚀 go-pugleaf

>>>> Can anyone out there help me with my search for something to use as an
>>>> electronic relative humidity sensor.

	Suddenly remembered that for a high-school science project, I
	did a circuit out of radio-electronics to turn off a de-humidifier
	at the appropriate time. Detector was a variable resistance in the
	grid circuit of a 2050 thyratron.

1	Take one box, plastic, approximately the size of the box greeting
	cards come in. Remove the top.

2	Mount 2 banana plugs in the box, about 3 inches apart. Leave the
	threaded parts sticking up into the box, plug parts sticking down.

	|______||________||_______|	<-- cross section looks like this
               ()        ()

3	Fill box about 1/4" deep with table salt.

	Resistance varies with humidity.

   Frank R. Borger - Physicist    __       Internet:  Frank@rover.uchicago.edu
Michael Reese - Univ. of Chicago |___      Phone : 312-791-8075 fax : 567-7455
  Center for Radiation Therapy   | |_) _   The race may not be to the swift nor
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    Chicago, Illinois 60616           |_)  how you bet. - Damon Runyon