Liquid level sensor

Details Liquid level sensor Liquid level sensor

G - Physics

01

F

262/1, 340/140.1

G01F 23/28 (2006.01) G01F 23/292 (2006.01)

Patent

CA 1277388

ABSTRACT OF THE DISCLOSURE LIQUID LEVEL SENSOR A liquid level sensor comprises a light source in the form of a semiconductor device, a light sensor also in the form of a semiconductor device, and an optical element arranged to transmit light from the light source and to receive reflected light and transmit it to the light sensor, the liquid level sensor further comprising a carrier having gas-filled cavities means in which the light source and the light source and the light sensor are respectively mounted, the cavities being separated by barrier means to prevent scattered light reaching the light sensor from the light source. The mounting of the light source and light sensor in gas-filled cavities extends significantly the operating temperature range of the liquid level sensor.

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