Capacitive Liquid Level Sensor for Arduino

DFRobotSKU: RB-Dfr-1157
Manufacturer #: SEN0507

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  • Capacitive Liquid Level Sensor for Arduino
  • Offers NPN + PNP dual output
  • Detects high viscosity and low corrosive liquids
  • Conical head of anti-hanging-liquid design
  • Detection Mode: Contact detection
  • Power Supply Voltage: 12 - 24 V

The Capacitive Liquid Level Sensor for Arduino is used to detect high-viscosity and low-corrosive liquids, such as glue, lubricating oil, grease, ink, engine oil, powder, and other special materials.

The sensitivity of the sensor can be adjusted by the knob (clockwise to increase, counterclockwise to decrease) to adapt to more media. It has an indicator light to feedback on the sensor status in real-time and comes with polarity protection and over-current protection mechanism.

Capacitance contact detection: Determine whether there is liquid and distinguish between liquids by detecting the capacitance of the liquid.

Conical head of anti-hanging-liquid design: Reduces the phenomenon of hanging liquid in detecting.

Special circuit design: Even if there are liquid residues, foam, scabs, etc. in the probe part, the appearance of false signals can be avoided by adjusting the sensitivity.

Stability design: With temperature compensation, the liquid level sensor can detect stably in the range of low temperature -25 °C and high-temperature 75 °C. These detailed designs ensure the stability of detection performance to a large extent.

Material: The head is made of PEEK material, and the shell is made of 316 stainless steel, with general anti-corrosion performance, M12 x1 standard thread, and is easy to install.


The liquid sensor should not be used in the following cases:

  • Temperature exceeds 75 °C
  • Pressure higher than 0.3 MP
  • There is dry glue on the probe that can't be removed
  • 1x Capacitive Liquid Level Sensor
  • 1x Screwdriver

Capacitive Liquid Level Sensor for Arduino - Click to Enlarge

  • Detection Mode: Contact detection
  • Detection Principle: Capacitive detection
  • Power Supply Voltage: 12 - 24 V
  • Detection Object: High viscosity and low corrosive liquid
  • Speed: Response speed is 20 ms, switch output frequency is 50 Hz
  • Output Signal: NPN + PNP Dual Output
  • Output Current: Max 100 mA
  • Working Power: <0.5 W
  • Working Temperature: -25 ~ +80 °C
  • Protection Level: IP65
  • Appearance Material: PEEK/316 stainless steel
  • Protection Mechanism: Polarity protection, over-current protection
  • Wiring Instructions: Brown-positive, blue-negative, black-NPN, white-PNP

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