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Control systems Magnetic level indicators
Potentiometer transmitter characteristics A potentiometer is placed in the vertical weather-proof tube outside the level indicator. The total resistance of a known value is measured at the ends of this potentiometer. The float, following the liquid level trend, activates the potentiometer’s reed contact chain through its own magnetic field, locally closing the signal. The total value of the resistance is measured 100% at its maximum level and 0% at its minimum level. The end poles of the potentiometer are connected to a converter that transforms the input value into Ohm and the output into mA.
5 mm 10 mm 20 mm
Reading resolution available
Resistance input
1 k ÷ 100 k Ohm
4.9 6
TI-P329-01 CTLS Issue 3
Page 6 of 11
Colima Visco and Viscorol Magnetic level indicators
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