Capacitive oil level sensor |

A capacitive oil level sensor determines the presence of a medium by detecting its conductivity. Capacitance is formed between the oil level sensor and the liquid medium it is immersed in.

When the probe tip of the capacitive oil level sensor is immersed in the liquid, the capacitance changes dramatically. When the oil level change reaches the capacitor's designed threshold, the circuit sends a signal (a switching signal, outputting a low-level alarm), thus achieving oil level detection and control.