The P31 Mini Float Control Switch Water Level Sensor is a compact plastic mechanical float switch with a ~10W contact rating, maximum 220V switching voltage, 0.5A maximum switching current, and 100 mΩ contact resistance. The float control switch works on the same buoyancy principle as larger float switches — an internal magnet or mechanism inside the float body triggers a switch contact as water level rises or falls past the mounting point, requiring no external power supply to operate.
The p31 float switch is a notably lighter-duty unit compared to higher-capacity float switches — its ~10W and 0.5A rating make it suitable for small pump control, mini tank level alerts, or signaling to a separate relay or controller rather than directly switching higher-power mains loads. As a p31 float control switch, the “P31” model designation is a recognizable part reference used across small appliance water level sensing, making sourcing replacement units or compatible alternatives straightforward. The mini water level sensor’s compact plastic body suits tight installation spaces where larger float switches won’t physically fit.
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:
- Compact plastic float body fits tight installation spaces
- Purely mechanical buoyancy operation — no external power needed
- P31 recognizable model designation for easy sourcing and replacement
- 100 mΩ low contact resistance for minimal signal loss
- Best suited for relay/controller signaling, not direct motor switching
Technical specifications:
 Applications:
- P31 Switch used for mini pump tank level signal trigger build
- College project uses float control switch for water level alert demo
- Small appliance uses p31 float switch for India water dispenser level sensing
- DIY build uses mini water level sensor for compact tank monitoring
- Aquarium uses p31 water control switch for low water alert circuit
Package includes:
- 1 x P31 Mini Float Control Switch
Tanvi Kanjolia –
Delivered in 3 days
Akash Kharabe –
Happy with purchase
Sushil Singh –
Trusted store product
Varun Mehboobani –
It provides reliable water level sensing and automatic control, making it ideal for water tanks, science exhibition projects, and liquid level monitoring applications