Contactless Liquid Level Sensor – Waterproof Detection (JST PH2.0 Connector)

This contactless capacitive liquid level sensor is designed for reliable liquid detection without direct contact with the fluid. The sensor mounts externally on the outside wall of non-metallic containers such as plastic or glass, making it ideal for applications where contamination or leakage must be avoided.

Its compact, flat design allows easy installation in tight spaces, while the high-sensitivity detection ensures accurate monitoring of liquid levels. The sensor outputs a digital signal, making integration simple for microcontrollers, automation systems, and monitoring circuits.

Common applications include fish tanks, washing machines, water purifiers, coffee machines, and other liquid monitoring systems.

Key Features

• Non-contact detection – senses liquid through the container wall

• Capacitive sensing technology for stable and reliable detection

• Compact flat design for easy mounting

• Digital output signal for simple integration

• Low power consumption (<2 mA operating current)

• Compatible with non-metal containers such as plastic and glass

• JST PH2.0 connector for secure electrical connection

• Long service life with industrial-grade reliability

How It Works

The sensor detects liquid levels through the outer wall of a container using capacitive sensing technology. When liquid is present at the detection point, the sensor outputs a low voltage signal (~0 V). When no liquid is detected, it outputs a high voltage signal (~5 V).

For multi-level monitoring, multiple sensors can be installed at different heights to detect low and high level points.

Applications

• Aquariums and fish tanks

• Washing machines

• Water dispensers and purifiers

• Coffee machines

• Liquid storage tanks

• DIY electronics and automation projects

Specifications

Cable Length Options

• 19 cm 

• 38 cm

Pin Definition

• Red – VCC

• Yellow – Signal

• Black– GND