Ultrasonic liquid level sensing system
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United States of America Patent
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Oct 20, 2020
Grant Date -
Jan 25, 2018
app pub date -
Nov 18, 2015
filing date -
Nov 18, 2014
priority date (Note) -
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Abstract
An ultrasonic sensor probe (100) and controller (109). The controller (109) is operationally configured to determine and display wet and dry status of each of a plurality of ultrasonic sensors (156) positioned in the barrel (123) of the probe (100). The controller (109) may change the status of a sensor (156) from wet to dry or dry to wet if certain conditions are met, such as the sensor (156) consistently indicates the new status over multiple readings or over a predetermined period of time. The controller (109) preferably includes a two-wire output capable of producing a stepped analog or digital signal that indicates the fluid level in a container in which the probe (100) is positioned.
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