| 摘要 |
A moisture sensor including a probe formed with a first ring of spines extending in parallel outward from a base and a second ring of spines extending in parallel outward from the base separated and insulated from the first ring, the spines forming an effective coaxial capacitor and being insertable into material to be sensed and an RC bridge circuit, preferably a Wien bridge connected to the rings to measure the impedance of the material.
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