Keller has introduced the LEO 5 CA, which offers a user-friendly way to represent the pressure measurement at the bottom of a tank as the quantity of remaining liquid. At the push of a button, the microcontroller performs the calculations using the information of the tank shape and dimensions and displays the remaining tank content quantity on the clearly legible 5-digit LED display in the desired unit (litres, gallons etc.).
The unit is configured using a PC and the easy-to-use software so that the filling level, which determines the pressure, can be converted into an appropriate filling quantity. First the tank shape is selected, and then the tank dimensions and the specific gravity of the liquid are entered. The program covers the most common tank shapes, but also allows others by entering the parameters into a specified table.
An accuracy of up to 2 mbar (corresponding to a 2 cm water column) is achieved using a computerised calibration and compensation procedure for the pressure sensors. LEO 5 CA makes it possible to connect various pressure transmitter versions with thread, front-flush with flange or submersible sensors.
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