A non-contact capacitive liquid level sensor designed for small-diameter pipes (outer diameter ≤10 mm). Detects the presence or absence of liquid through the pipe wall without any physical contact with the liquid — making it safe for corrosive substances like strong acids and alkalis.

Features adjustable sensitivity, a status indicator LED, and a 4-pin sensor adapter for direct digital signal connection to Arduino or other microcontrollers. Provides real-time level feedback with ±1.5 mm accuracy.

Key Features

• Non-Contact Detection – Senses liquid through the pipe wall using capacitive technology
• Small Pipe Compatible – Designed for pipes with outer diameter ≤10 mm
• Adjustable Sensitivity – Tune detection threshold for different pipe materials and liquids
• Status Indicator LED – Visual feedback of liquid detection state
• Digital Output – 4-pin adapter for direct connection to microcontrollers
• IP65 Waterproof – Suitable for wet environments

Specifications

• Power Supply – 5–24V
• Output – Digital switch (high/low)
• Response Time – 500 ms
• Operating Temperature – -5 to 105°C
• Suitable Pipe Diameter – ≤10 mm (outer diameter)
• Liquid Level Accuracy – ±1.5 mm
• Material – ABS
• Waterproof Rating – IP65

Ideal For

• Water dispensers and small pipe monitoring
• Medical and laboratory perfusion tube detection
• Corrosive liquid level monitoring (acids, alkalis)
• Arduino and microcontroller-based liquid sensing projects

Resources

• DFRobot Product Wiki