Re: INFRARED ASSOCIATES DETECTOR INFO NEEDED



Richard W. Solomon, W1KSZ wrote:
I acquired an Infrared Detector in a lot but cannot locate any info
on it. It was made by Infrared Asscociates of New Brunswick, NJ,
and the label says Model Number HCT-NB-A.

I don't recognize the model number, but my experience with them had been that they are photoresistors.. With a constant bias of a few volts, mre trickle current flows when there is light ot IR falling on them. The sesitive spot was located at the focal point of a refracting lens (that transmits in the infrared) or a small parabolic mirror. They often had to be cooled. If it is of a cooler type, the senstitive spot was under the bottom of a contaner.. looks like a small inkwell.

drmant resistance was a few hunderd k at room temperature; few megs when cooled.

Does anyone have any info on this ? I hate to trash it if it can be
used by someone.

Mu last crack at them was inthe 1950's.

Angelo Campanella

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