Moisture measuring apparatus

G - Physics – 01 – N

Patent

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Details

340/139, 73/71,

G01N 27/22 (2006.01) G01R 27/26 (2006.01)

Patent

CA 1087870

Abstract A moisture measuring apparatus includes a tuned circuit, a moisture sensor, coaxial cable means between the sensor and the tuned circuit wherein the tuned cir- cuit times the coaxial cable, and a circuit for ascertaining the leading presented by the sensor to the tuned circuit whereby moisture is measured. The sensor is alternately connected and disconnected to an end of the coaxial cable and the signal drive across the tuned circuit is standardized, when the sensor is disconnected, for zeroing the instrument. Also, the gain of the cir- cuitry is adjusted by periodically providing a standard load to the tuned circuit while adjusting amplification to bring about a standard output. The apparatus is not as sensitive to cable changes as prior apparatus and a plurality or selectable coaxial cables are provided on reels adjacent the sensor console.

278780

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