Water Level Switch (Liquid sensor with a float ball)

This water level float switch detects the presence or absence of liquid in a tank. It acts as a simple on/off switch, making it ideal for automatically controlling a pump, alarm, or indicator light based on the fluid level.

Specifications

• All-or-nothing switching operation (normally open or normally closed depending on installation).
• Lightweight plastic float and corrosion-resistant body material.
• No direct electronic power supply required: functions as a mechanical switch.
• Suitable for fresh water, salt water, hydroponics systems, and aquariums.

Note: This sensor does not require an Arduino library. It connects directly to a digital input with internal pull-up resistance to detect the high/low state of the float.