Liquid level alarm circuit

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Photocoupler

The non-contact liquid level alarm introduced in this example is generally applicable to the liquid level alarm of strong acid or strong alkali solution. The alarm is divided into two parts: the liquid level sensor and the signal processor. Do not directly touch the liquid. Place a float containing a piece of wire on the surface of the solution to measure the liquid level. Working principle The non-contact liquid level alarm circuit is divided into two parts: the liquid level sensor and the signal processor. R1-R3, C1-C3, VT and L1, L2 form the liquid level sensor circuit, and the rest are signal processors.