SPD - String Pots & Draw-wire Sensors
The Celesco SPD range of cable extension transducers (also known as string pots or draw-wire sensors) offer you an IP67 sealed, cost effective solution for measuring linear displacement in a very space efficient package. With measuring ranges from 4 inches (100mm) to 50 inches (1270mm) the SPD units are very popular for external measurement of hydraulic and pneumatic cylinders. The SPD offers a user selectable 0...10VDC or 4...20mA output. An IP40 version is available (SP3).
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