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A water level sensor is a device used to detect the presence or level of water in a tank, reservoir, or other container. Here’s a detailed overview of its types, features, applications, and wiring:

Key Features

• Detection Method: Various methods such as capacitive, resistive, or ultrasonic sensing.
• Output Type: Can provide analog (continuous level) or digital (high/low) signals.
• Real-time Monitoring: Allows for continuous monitoring of water levels.

Types of Water Level Sensors

1. Float Switch: A simple mechanical device that uses a float to open or close a switch based on water level.
2. Ultrasonic Sensor: Measures distance to the water surface using sound waves, suitable for non-contact applications.
3. Capacitive Sensor: Measures changes in capacitance caused by the presence of water.
4. Resistive Sensor: Uses probes that conduct electricity; water's conductivity closes a circuit at certain levels.

Wiring (Example: Float Switch)

For a typical float switch:

1. Power Connections:

   • Connect the power supply to the float switch terminals.

2. Output:

   • Connect the output terminal to a microcontroller or relay to control a pump or alarm.