Automotive Fuel Level Sensors

Fuel Level Sensors are done by a series of reed switches positioned inside the electronic tube, a float with built in magnet moving up and down when fluid level changes, would trigger the reed switches inside the tube respectively, thus, generate a potential free resistance signal with an Ohm value to indicate the changes of fluid level. The switch contacts are hermetically sealed in the inert gas, and operated by a float magnet which is the only moving part of the sensor, thereby minimize potential mechanical failures. It is more reliable than the traditional resistive fuel level sensor.