Potentiometric displacement sensor is used for direct or non-direct, precise measurement of mechanical displacement. Potentiometers have high resolution to conduct linear or angular motion displacements and they always operate with a sliding contact system.
Potentiometers allow changes in the resistance in a circuit and functioning as a variable voltage divider. Potentiometer is commonly used in research laboratories, industrial processing, and robotics as well as on medical, construction and agriculture equipment for various control purposes.
|±0.05% max.||10µm||100000000 movements||IP60|
|±0.05% max.||0.01mm||100000000 operations||IP40|
|0.05% F.S.||0.01mm||100000000 operations||IP40|
|0.05% F.S.||0.01mm||>100000000 operations||IP40|
High IP rating
|±0.05% F.S.||0.01mm||100000000 operations||IP60, IP65, IP67|
|Linearity||± 0.05% F.S.|
Known as a variable resister used for voltage dividing, potentiometer is the simplest type of displacement sensor that coverts a mechanical motion into an electrical signal which is proportional to the mechanical displacement.
In below figure, a voltage is applied across the resistor and a wiper of the potentiometer is moving causing changes in resistance that is directly converted to voltage and/or current signals.
“Potentiometers comprise a resistive element, a sliding contact (wiper) that moves along the element, making good electrical contact with one part of it, electrical terminals at each end of the element, a mechanism that moves the wiper from one end to the other, and a housing containing the element and wiper.” [wikipedia]
Potentiometers are cost-effective devices widely used in automotive, molding machines, medical equipment, robotics, wood processing machinery, printing equipment, spraying, machine tools, sports equipment and other applications requiring precise measurement of displacement.
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– Strokes on riveting machines;
– Spring travel measurements on axes;
– Length measurements on pipe bending equipment;
– Offset measurements on bearings;
– Measurement of feed, bending, deformation and press-fit displacements;
– Length tolerance, displacements on electromagnets;
– Measurement of advanced movements on pneumatic and hydraulic cylinders;
– Measuring wind-up and unwinding lengths;
– Measurements on undercarriages and dosing systems;
– Measurement of jointing;
– Determining the movement on linear axes or electric spindles.
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