Non-contact type capacitance induction level sensor
A liquid level sensor and capacitive sensing technology, applied in the field of liquid level sensors, can solve problems such as short service life, failure of water level detection, and easy to be damaged by lightning strikes, so as to reduce the probability of failure and prolong the service life
Inactive Publication Date: 2009-05-13
俞险峰
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Abstract
A non-contact capacitance induction liquid level sensor comprises an insulation shell, a capacitance induction metal part and a liquid level detection circuit. The insulation shell is vertically arranged, the capacitance induction metal part is vertically arranged inside the shell, and the liquid level detection circuit is arranged inside the shell; the liquid level detection circuit comprises an analog input port which is used for being connected with the capacitance induction metal part, and a liquid level measurement module which is used for detecting a capacitance value of the analog input port, and obtaining a current liquid level value according to a corresponding relation between a preset capacitance value and the liquid level; and the capacitance induction metal part is connected with the analog input port. The invention provides the non-contact capacitance induction liquid level sensor which can be effectively used for a long time even under a harsh environment.
Application Domain
Level indicators by physical variable measurement
Technology Topic
CapacitanceEngineering +3
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