27L series includes Float Reed level transmitters. Inside the float is placed a toroidal magnet which drives, without contact, Reed contacts located inside the guide pipe. Moving along the guide pipe the float changes the reed contact status. These variations are then acquired by the electronic board and converted into a current signal. This system enable a continuous level measurement (output 4÷20mA) with high repeatability and linear level indication independently from tank shape, or allows to realize on-off controls by using two floats (output On-Off 5÷15mA).
