Pressure Sensors
Water pressure sensors are often used to measure the level of water in a tank, or the rate of change in that level. The sensor is fitted to the top of an open-ended tube submerged within the container. As the water level rises, the air above the water in the tube is compressed, increasing the pressure on the sensor. An analogue-to-digital convertor (ADC) is used to convert the signal from the sensor into a digital value.
They can also be used to gauge the pressure in pipes where water is flowing – for example, in water distribution systems, to automatically determine whether pumps need to be activated to increase the flow rate.
