Part Number 654 00 084
Resistive track printed on circuit board
Features:
– Linear design, contactless operation
– Active length: 105mm; total width: 22mm
– Operating temperature 0 °C to +55 °C
– Placement of additional electronics possible
Sensofoil FR4-Magnet Linear 100mm
$29.89
Part Number 654 00 084
Resistive track printed on circuit board
Features:
– Linear design, contactless operation
– Active length: 105mm; total width: 22mm
– Operating temperature 0 °C to +55 °C
– Placement of additional electronics possible
– Magnet for Sensofoil PET-Magnet: D44-N52 Neodymium Magnet
How Does it Work?
A Sensofoil® membrane potentiometer FR4-Magnet consists of a resistive track printed onto a circuit board and a collector track printed onto the top PET foil layer. These layers are seperated by a so-called spacer. Only when the layers connect through mechanical pressure using a wiper a signal is produced.
For contactless operation, an additional layer is added using a ferromagnetic material. The feromagnetic strip is pulled by a magnet, pressing the collector foil against the resistive track, therefore creating a
contact. With the correct dimensions, linear paths and angles can be measured contactless, even through enclosures.
Ideally, a low DC voltage is connected to the resistive track and tapped at the collector track in the form of a voltage divider. A linear relation exists between the length of the resistive track, or the angle of the resistive track for rotary sensors, and the applied voltage. At 50% of distance traveled, 50% of the applied voltage is measured.
Quality characteristics of the Sensofoil® membrane potentiometers are resistance values, their corresponding tolerances and the non-linearity. The non-linearity represents the actual deviation of the output signal to an ideal reference line and is expressed as a percentage of the applied supply voltage.