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This Water Level Sensor Float Switch is a device used to sense the level of the liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device.
A compact, horizontally mounted float switch which can be configured as a Normally-Open or Normally-Closed switch simply by rotating it through 180°.
When the water level reaches the float, the float moves and an internal magnet activates a sealed reed relay in the device.
The sensor is supplied pre-wired with fling output leads.

Applications
Saltwater Tank
Freshwater Tank
Gardening
Aquariums for power head control
Fish Tank

Specifications
• Material: Plastic
• Color: Black
• Switch Power (Max): 10W
• Switching Voltage (Max): 100V
• Switching Current (Max): 0.5A
• Breakdown Voltage (Max): 220VDC
• Carry current (Max): 1A
• Contract Resistance: 100 milli-ohm
• Temperature Rating: -20 ~ +80
• Float Length: 85 mm / 3.35″
• Cable Length: 38cm

GSM Based Water Level Monitoring System Using Arduino
is Soo many homes fill the tank with the help of the water pump but sometimes the water pump full the tank but is automatically not Motor to off that’s time water is overflow.
This project help to indicate the water level of the tank suppose the motor fills the tank and the water is level with the tank that time the motor is automatically off, And the GSM Module Send the Full message to the owner your Water Tank is full.

We Used The Sim800l GSM Module And required The 3.7v Dc Supply, That’s why I Used The LM2596 Step-Down converter the Convert the 9v Dc Supply to 3.7v Dc Supply. The Gsm Module is Connected to the PIN D2-Rx And D3-Tx.
16×2 LCD, they will show the water level of the tank Suppose the water level is empty then LCD Will Display the water level is empty and if the water level is Full they Display Ware Tank Level Is Full.the 16×2 Lcd Display Will Content To The Pin Number D12,D11,D10,D9,D8,D7 And Vcc To +5v ,GND TO GND.