Aiming at shortcomings of traditional level gauge using tongue tube is easy to produce vibration

and has poor long-term stability

design a novel liquid level sensor using Hall switch as sensitive element. Working principle and design scheme are introduced in detail

and magnetic field of the magnetic float is simulated using ANSYS software. Through analysis

the size of permanent magnet can be determined according to measurement precision

process is simplified and workload is reduced. The sensor can output standard current signal 4

20 m A and digital communication RS-485

according to the need

and it also can be equipped with LED indicator. The experiment shows that the sensor has many characteristics like large effective distance

less interference

fast response rate

and

high reliability.