The Fuel level sensor principle

  

  The Fuel level sensor is variation of capacitance between the sensor housing and the induction electrode caused by oil into the container, and this changes into the current change detection of oil in the container position (height) parts.

  At present, the existing technology, the oil level sensor is divided into two categories:

  Is a sliding potentiometer as the basic detection device, which is composed of the float drives the potentiometer, and then detect the ohm resistance, so as to achieve the purpose of display level, but when the grease covered potentiometer, the resistance will change, causing the error is too large, can not even use, make the tank sensor become vulnerable parts of life is short the.




  The other is to use inductive coil as the basic detection element. It is with the float drives the inductance coil, when the oscillation frequency change shock circuit, the frequency meter to detect the frequency to determine oil (liquid) bit. But its complex structure, troublesome debugging, high cost, the price is expensive, can not be widely used, and the use of reed is not only long life, safe and reliable operation, and no spark new level sensor production characteristics, is an excellent substitute for oil level sensor with all kinds of vehicles.


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