Non-contact Liquid Level Switch

This non-contact liquid level switch detects liquid through the wall of a non-metal container — no immersion required. By mounting the sensor on the outside surface of a tank, cup, or bottle, you can monitor liquid levels without contaminating the liquid or exposing the sensor to corrosion.

The sensor triggers when the liquid level falls below its position, outputting up to 100 mA — enough to directly drive a relay. It operates on 5V with extremely low 25 µA working current, and can detect through container walls up to 13 mm thick.

Key Features

• Non-Contact Detection – Mounts on the outside of non-metal containers
• No Liquid Contamination – Sensor never touches the liquid
• 100 mA Output Current – Can directly drive a relay
• Ultra-Low Power – 25 µA working current at 5V
• Wide Wall Thickness Range – Detects through 1–13 mm container walls
• Wide Temperature Range – −25°C to 125°C operating range

Specifications

• Power Supply – 5V
• Working Current – 25 µA
• Output Current – Up to 100 mA
• Detectable Wall Thickness – 1–13 mm
• Operating Temperature – −25°C to 125°C

Ideal For

• Water tank and reservoir level monitoring
• Automated irrigation and aquarium systems
• Drink reminders and smart container projects
• Any application requiring non-invasive liquid detection

Package Contents

• 1× Non-Contact Liquid Level Switch (with sensor cable)

Resources

• Manual (PDF)