Penberthy, Inc.

Brian J Goodwin

Gary G Sanders

A highly accurate system to measure the level of material in a vessel. A probe is provided in the vessel. The vessel and the probe are at different potentials so as to create a capacitance therebetween. The air and materials in the vessel act as dielectrics. As the material level varies, so does the capacitance. This capacitance is subjected to a charge-discharge-charge cycle yielding integrated net neutral charge. The duration of the cycle is compared to a reference time to determine capacitance, which is proportional to the level of material in the vessel.

Apparatus and method for sensing material level by capacitance

A highly accurate system to measure the value of a capacitor using proportionality against a time base reference. The capacitor under test is linearly sequentially charged in three discrete steps yielding integrated net neutral charge as well as a delay for discharging dielectric absorption during each measurement cycle.

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Rock Falls, IL, United States of America

Brian J Goodwin