Sensitivity of electronic moisture sensor to low levels of moisture increased by new electrode configuration. Moisture-sensing circuit described in "Low-Cost Humidity Sensor" (NPO-16544). New twisted pair of wires takes place of flat-plate capacitor in circuit. Configuration allows for thermal expansion and contraction of polymer while maintaining nearly constant area of contact between polymer and wires.
Twisted Pair Of Insulated Wires Senses Moisture
NASA Tech Briefs ; 13 , 7
1989-07-01
Miscellaneous
No indication
English
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