Functionality foil potentiometer
Our foil potentiometers Sensofoil® consist of several foil layers, which are separated by a spacer (spacer) separated from each other be Only the exercise of a mechanical pressure, by means of a slider or a finger connects the foil layers to each other and generates a signal that can be evaluated .
The top film layer, the collector film, protects the resistive track from external influences, such as dust or liquids. The The entire electrical function is therefore inside the potentiometer and delivers flawless measurement conditions. Our foil potentiometers function as potentiometric voltage divider.
More information about potentiometers in the Induux Wiki.
Potentiometer solutions
Our Sensofoil® film potentiometers for temperature ranges from -25°C to +55°C can be manufactured in four versions:
- Sensofoil® PET radial: flexible with polyester film
- Sensofoil® PET linear: flexible with polyester film
The potentiometer resistor track is printed onto the base film and bonded to the remaining film layers. The design of the potentiometer can be linear as well as radial.
Potentiometer structure:
- Collector foil as slider tap
- Spacer (spacer)
- Base foil with potentiometer resistor
- Adhesive on the back
Technical details:
- Linear and radial designs
- Flat overall height from 0.5 mm
- Lengths up to 900 mm
- Widths from 10 mm
- Operating temperature from -25°C to +55°C
- Storage temperature from -25°C to +85°C
Our Sensofoil® Hybrid was developed so that potentiometers can also be used at higher temperature ranges. The hybrid potentiometer is available in the following version:
- Sensofoil® PET hybrid: flexible with polyester film
In hybrid technology, a flexible metal strip is integrated into the potentiometer. This makes the potentiometer resistant to high temperatures up to +80°C. At the same time, a so-called denting effect is significantly reduced or even completely avoided. This effect can occur at temperatures from +55°C and long standing times of the grinder. Sensofoil® Hybrid is used in the automotive sector, in space technology and in all industrial applications where high working temperatures prevail.
Potentiometer structure:
- Collector foil as slider tap
- Metal band (hybrid technology)
- Spacer (spacer)
- Base foil with potentiometer resistor
- Adhesive on the back
Technical details:
- Linear and radial designs
- Flat overall height from 0.5 mm
- Lengths up to 900 m
- Widths from 10 mm
- Operating temperature from -40 °C to +80 °C
- Storage temperature from -40 °C to +80 °C
In our foil potentiometer Sensofoil® Magnet, a ferromagnetic material has been integrated in the layer structure. The magnetic potentiometer is available in the following version:
- Sensofoil® PET magnet: flexible with polyester film
This potentiometer is actuated without contact via a magnetic wiper. Measuring a displacement or angle through a housing is therefore no problem. This non-contact design of the potentiometer additionally contributes to a long service life.
Potentiometer structure:
- Collector foil as slider tap
- Ferromagnetic layer
- Spacer (Spacer)
- Base foil with potentiometer resistor
- Adhesive on the back
Technical details:
- Linear and radial designs
- Flat overall height from 1.6 mm
- Lengths up to 900 m
- Widths from 10 mm
- Operating temperature from 0 °C to +55 °C
- Storage temperature from -25 °C to +85 °C
We have developed a paste formulation that allows abrasion and chemical resistant resistance webs to be printed on inexpensive film material. The SensoInk® PET polymer potentiometer is ideal for applications on curved surfaces. The resistive web is printed on a PET film and is exposed. The signal is tapped using a conductive scraper wiper.
A proven thick film paste has been modified to fully crosslink and cure at a temperature level that matches the resistance of the film. In terms of abrasion resistance and chemical resistance, this polymer film potentiometer is comparable to that with conductive polymer on FR4 material.
Potentiometer structure:
- Polyester film with potentiometer resistor
- Adhesive on the back
Technical details:
- Linear designs
- Flat height from 0.1 mm
- Lengths up to 900 mm
- Widths from 5 mm
- Operating temperature from -40°C to +85°C
- Storage temperature from -40°C to +85°C
The SensoInk® FR4 polymer potentiometer is an open potentiometer. The resistor track is printed on a rigid printed circuit board and is exposed. A conductive scraper can be used to determine the location voltage and associated position. The polymer potentiometer FR4 is available in two versions:
- SensoInk® FR4 linear: flexible with polyester film
- SensoInk® FR4 radial: rigid with printed circuit board
Until now, the resistor layer of open potentiometers was printed on a separate carrier material, which was attached to the printed circuit board after the assembly process. With SensoInk®, the process steps are significantly simplified. The potentiometer track is printed directly onto the printed circuit board to be assembled. A very stable and at the same time inexpensive technology that is firmly established in displacement and angle measurement.
Potentiometer structure:
- Printed circuit board with potentiometer resistor
- Adhesive on the back
- Rear electronics assembly (optional)
Technical details:
- Linear and radial designs
- Flat overall height from 0.5 mm
- Lengths up to 900 mm
- Widths from 5 mm
- Operating temperature from -40°C to +85°C
- Storage temperature from -40°C to +85°C
For signal generation of our potentiometers, a suitable slider can be used in addition to finger actuation. For foil potentiometers with PET surface we recommend grinders with a plastic head.
The grinder must be integrated into a grinder carrier, such as a custom injection molded part. We are happy to support you in the development of your potentiometer solution.
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possibilities of our potentiometer solutions.
