Water Level Sensor

Water level sensors & liquid level sensors for storage tanks

Various level sensors are used to detect the level of a liquid commonly inside a tank. Water level sensor is one of the most common types of such sensors.

Different liquid sensors are used to detect the level. One of the oldest types of water level detector is a float which is a simple level with an air-filled float at the end of it. Water level sensors of modern technology are a non-touch type, implying that the sensors will not touch water or the liquid.
One such technology is ultrasound which consists of a transmitter and receiver mounted at the top of the tank. The transmitter generates ultrasonic waves towards the bottom of the tank. The sound waves get reflected the top of the liquid and bounces back to the receiver which is adjacent to the transmitter. The speed of the waves and time taken from the moment the ultrasonic wave is generated and the time it is received back at the receiver gives an easy calculation of the distance from the transmitter to the top of the liquid

The advantage is that this type can be used for very tall tanks and even for liquids which are corrosive in nature. All level sensor will have electrical outputs for displaying the readings and switching circuits will be provided for switching circuits.