P31 Mini Float Control Switch Water Level Sensor

The P31 Mini Float Control Switch is a compact mechanical water level sensor that detects water height using a floating ball connected to an internal switch. As water rises or falls, the float tilts and opens or closes the contact inside. Float control switches like this work without any electronics or power supply on the sensing side, which makes them far simpler to wire than ultrasonic alternatives.

The P31 float switch handles a maximum switching voltage of 220V and a current of 0.5A, with a contact rating of 10W. One thing many users miss is that contact resistance at 100 mΩ can cause a small voltage drop when switching inductive loads like pump motors, so using a relay in between is the safer choice for motor circuits. The mini float control switch is not rated for submersible continuous operation.

Students and small automation engineers use this mini water level sensor for tank overflow protection and pump control. StemVolt provide this ready to use sensor. Connect the two leads to your relay input and set your tank level by adjusting the float position.

Related Products:

• Checkout Float Ball Water Level Sensor Switch

Features:

• Switching voltage rated up to 220V allows direct connection to AC pump control circuits
• Maximum current of 0.5A makes this suitable for low-power relay trigger applications
• Plastic body construction resists moisture exposure in typical water tank environments

Technical specifications:

Applications:

• Home water tank uses this P31 Mini Float Control Switch to stop pump overflow automatically
• Agricultural water trough controller uses float switch to maintain livestock water at set level
• School electronics lab uses mini water level sensor to demonstrate basic level control circuits

Package includes:

• 1 x P31 Mini Float Control Switch