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Detailed Product Description:

The P35 Small Float Level Control Switch is a simple yet highly effective solution for liquid level sensing in a variety of applications. This versatile sensor operates on the principle of magnetism and buoyancy, making it a reliable, non-contact device for monitoring the level of water and other compatible liquids. The main body, constructed from durable and corrosion-resistant PP (polypropylene) plastic, contains a sealed reed switch. As the liquid level changes, the white magnetic float moves along the body, and when it reaches the trigger point, it magnetically activates the internal switch. This action can be used to control a pump, trigger an alarm, or send a signal to a microcontroller.

A key technical advantage of this magnetic float switch for water is its reversible design. By simply inverting the switch during installation, you can easily change its operation from a normally open (NO) state—perfect for a "low-level" or "fill" application—to a normally closed (NC) state, ideal for "high-level" or "empty" functions. With a maximum contact rating of 10W, a switching voltage up to 100VDC, and a maximum current of 0.5A, it's designed for low-power signaling rather than direct control of motors, ensuring safety and longevity when used with a relay or a microcontroller.

Whether you are building an automated water level controller for your home water tank, a hydroponic system, or a custom aquarium refill system, this liquid level sensor provides a dependable and cost-effective solution. Its simple mechanical design, combined with robust electrical performance, makes the P35 float switch an essential component for any DIY electronics project that requires precise and reliable liquid level detection.

The SEN-PPI35 Magnetic Float Sensor is a simple yet reliable water level switch that uses a reed switch and magnet mechanism to detect changes in liquid level. When the water level rises or falls, the float moves and triggers the internal switch (ON or OFF). This sensor is commonly used for automatic pump systems, tank level indicators, aquariums, and overflow alarms.

Designed with a compact white plastic body, the sensor is easy to mount vertically using the included nut and washer. It works seamlessly with microcontrollers and automation boards, requiring just a digital input pin to monitor the water level.

Key Features:

• Magnetic float switch sensor for accurate water level detection

• Vertical mounting with threaded nut for secure placement

• Compatible with Arduino, ESP32, STM32, Raspberry Pi

• Easy to interface with relays, alarms, and motor controllers

• Durable plastic housing, waterproof and corrosion-resistant

Technical Specifications:

How to Use with Arduino:

1. Connect:

   • One wire → GND

   • Other wire → Digital pin with internal pull-up enabled

2. Sample Arduino Code:

Note: In the default position, the float switch is open (no signal), and closes when water level rises.

Applications:

• Water tank level monitoring

• Aquarium overflow prevention

• Automatic pump control

• Liquid detection systems in labs or factories

• DIY home automation water projects

Package Includes:

• 1 × Magnetic Float Sensor White SEN-PPI35

• 1 × Mounting Nut & Washer