The float level gauge uses a magnetic levitation ball as the measuring element, and through magnetic coupling, the resistance inside the sensor changes linearly. The intelligent converter converts the resistance change into a 4-20mA standard current signal, which can display the percentage of liquid level, 4-20mA current, and liquid level value on site. It can be remotely transmitted to the control room to achieve automatic detection, control, and recording of liquid level. This instrument is suitable for measuring the liquid level of sewage treatment and various atmospheric and pressure vessels in industries such as petroleum, chemical, power, light industry, and medicine, especially for measuring the liquid level of underground storage tanks and storage tanks. The structure of a floating ball level gauge is composed of a floating ball, a plunger, etc. The floating ball level gauge is installed on the top of the container through a connecting flange. The working principle of the floating ball level gauge is that the floating ball floats on the liquid surface according to Archimedes' buoyancy principle. When the liquid level of the container changes, the floating ball also moves up and down. Due to the magnetic effect, the dry spring of the floating ball level gauge is magnetically attracted, and the liquid level position is changed into an electrical signal. The actual position of the liquid is displayed digitally on the display instrument, and the floating ball level gauge achieves remote detection and control of the liquid level. Characteristics of float level gauge: 1. Suitable for measuring the liquid level and interface of liquid medium in containers. In addition to on-site instructions, it can also be equipped with remote transmitters, alarm switches, and complete detection functions. 2. The indication is novel, the reading is intuitive, eye-catching, and the direction of the observation indicator can be changed according to the user's needs. 3. The measurement range is large and not limited by the height of the storage tank. 4. The indicator mechanism is isolated from the tested medium, with good sealing, high reliability, and safe use. 5. Simple structure, easy installation, and convenient maintenance