I wonder how well they would like water inside them
Generally air pressure sensor hate water. But in this case the sensor can be located far away from water tank. All you need is a tube (the larger it is the best resolution you get) with the top end sealled and connected via a small plastic tube to your sensor. The open side of the tube is deeped into water so that if the level increase the space, inside the immersed tube will decrease and as a conseguence the air pressure will increase. The only problem with this method is that Pressure = volume * temperature (gas equation). So if temperature double also the pressure inside the tube will double without any change in water level. This to warn you to use also a temperature sensor and compensate the pressure reading for the temperature change.
Al.
Last edited by aratti; - 21st July 2009 at 07:36.
All progress began with an idea
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