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Contactless Liquid Level Sensor

The intelligent non-contact liquid level sensor uses advanced signal processing technology and high-speed signal processing chip to break through the influence of the wall thickness of the container and realize the true non-contact detection of the liquid level in the closed container.

The liquid level sensor has intelligent liquid level reference adjustment and memory function, liquid level status display mode, which can realize multi-point series connection; can support high and low level output, NPN, PNP signal output, and RS485 communication interface output; open collector output mode, wide voltage range (5-24V), suitable for connecting various circuits and product applications.


  • Supply Voltage (Vin): (DC 5-12V) (DC 24V)
  • Output Mode: Switch quantity (high pulse effective)
  • Power Ripple Requirements: <=200 mV
  • Electric Current: 5mA
  • Response Time: 500mS
  • Working Temperature: -20 ~ 80°C
  • Humidity: 5%~100%
  • Induction Thickness (Sensitivity) Range: <=20mm (Container wall thickness)
  • Liquid Level Accuracy: ±1.5mm
  • Line Length:500MM (±10MM) 
  • Terminal Sequence: Brown (power supply positive), Yellow (signal output), Blue (power negative), Black (COM terminal)
  • Material: PC V0 Fireproof Material
  • Waterproof Performance: IP67


  • 1 x Contactless Liquid Level Sensor
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