1
Kim W Atherton, Charles R Clow, Patrick H Mawet: Dielectric liquid level sensor and method. Caterpillar, Robert E Muir, February 21, 1989: US04806847 (72 worldwide citation)

A sensor for sensing the level of oil or transmission fluid under both normal and extreme temperature conditions. The only active components of the sensor have input and leakage currents substantially lower than those of diodes and current sources under high temperature conditions. The sensor has a ...


2
Kim Wesley Atherton, A Brinkley Barr, Thomas M Harmon, Michael M Van Schoiack, Marvin E Vandehey, Richard D Weyerts, Charles R Clow, Patrick H Mawet: Digital oil level sensor. Caterpillar, Terry D Morgan, Robert E Muir, May 24, 1988: US04745893 (18 worldwide citation)

An oil level sensor includes a sensor body adapted to be mounted to the block or casing of an oil-containing reservoir. A probe including a pair of electrodes forming a capacitor extends from the sensor body so that the capacitor will be at least partially immersed in the oil to detect the level the ...