INTRODUCE

External ultrasonic liquid level switch (referred to as "external liquid level switch") is a new type of liquid level measurement alarm device. It is mainly used to detect the liquid level of the tank, realize the upper and lower limit alarm or monitor whether there is liquid in the pipeline (dry state protection). The tank material can be all kinds of metal, non-metal or non foaming plastic, and the wall thickness can reach 70mm. This technology is not affected by medium density, dielectric constant, conductivity, reflection coefficient, pressure, temperature, precipitation and other factors, so the level controller is suitable for all kinds of liquid level engineering control in medicine, petroleum, chemical industry, power, food and other industries. This product is an ideal choice for the detection of toxic, strong corrosion and dangerous goods.

Working Principle

The sensor of the liquid level switch couple the high frequency ultrasonic pulse to the container wall through the coupling agent. The pulse will propagate in the container wall and the liquid, and will be reflected by the inner surface of the container. Through the detection and calculation of the reflected signal characteristics, it can be determined whether the liquid level is at the installation position of the controller. The liquid level controller can output relay signal, which is convenient for the detection and control of liquid level.

Advantages

• Wide Application: It can be used to measure all kinds of liquid medium in highly toxic, highly corrosive, high pressure, various complex working conditions and explosive gas environment.

• It can be installed without stopping production, tank cleaning and no fire, easy to install and operate.

• Reliable operation, stable performance and strong anti-interference ability.

• The instrument does not need to be maintained by the user and has a long service life.

Application Conditions

• Medium: Pure liquid, emulsion liquid, suspension liquid, etc.

• Vessels: The wall of the vessel where the ultrasonic probe is installed shall be made of hard materials which can transmit signals well. For example: carbon steel, stainless steel, various metals, FRP, epoxy resin, hard plastic, ceramics, glass, hard rubber and other materials or other conforming materials. The internal and external surfaces of the vessel walls shall be flat. If the vessel wall is multi-layer material, each layer shall be in close contact without bubbles or other interlayer. For example: Vulcanized hard rubber lining, epoxy resin lining, stainless steel lining, titanium lining, etc.

Technical Parameters