Non-Invasive Level Switch

Non-Invasive Level Switch 2021-07-12T13:38:32+00:00

Project Description

Non-Invasive level switch 


  • Non-Invasive ultrasonic level switch
  • Non-Invasive ultrasonic level switch
  • Non-Invasive ultrasonic level switch
  • Non-Invasive ultrasonic level switch
  • Non-Invasive ultrasonic level switch


  • High/Low Position alarm

  • Alarm position – At any place required. Not limited by fixed hole on the side wall.

  • Non-contact with the liquid inside.

  • No maintenance, not influenced by (exp: thick oil deposits).

  • No tank break in; Non-side drilling; No flange

  • No shutdown/empty tank during installation.

  • Local Alarm & Display/Relay output to PLC


The Non-Invasive level switch is a new type of liquid level monitoring and alarming device. It is mainly used to monitor the liquid level of the storage tank, realize the upper and lower limit alarm or monitor whether there is a medium in the pipeline (dry state protection). It can be applied to the liquid level process control of medicine, petroleum, chemical industry, power, food, and other industries.


The sonar pulse generated by the sensor (probe) of the Non-Invasive level switch can pass through the container wall. This pulse will propagate in the container wall and liquid and will be reflected back. Through the detection and calculation of this reflection characteristic, it can be judged whether there is liquid in the container at the monitoring point. the level switch can output relay signals to PLC, SIS, etc,  so as to realize the monitoring or control of liquid level on the system.

Non-Invasive ultrasonic level switch

Technical specifications

Power DC 24V
Signal Output Relay Output (passive node)
Relay capacity (DC 30V 6A ) 、( AC 250V 6A)
Repeatability error 土5mm
Container Wall Thickness Max 60mm
Container Material Steel, stainless steel, glass, non foaming plastic and other dense materials
Measurable medium Pure liquid, emulsion liquid, suspension liquid
Ambient temperature -20℃~+70℃
Ambient humidity (0%~95%) RH
Rated Power 3W
Transmitter Material Cast Aluminum
Protection Rating IP67
Electrical Connector M20 X 1.5
Hazardous Area Approval ExdIICT6
Weight  2 KG
Dimension Length158mm×Width122mm×Height148mm


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