Sefar Inc.
Sensing
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Sefar provides a mass-producible generic fabric for sensors which allow the measurement of various activities of human bodies by capacitive, resistive and/or bio-impedance mode.
Pressure-sensitive fabrics
Sefar provides a mass-producible generic fabric for sensors which allow the measurement of various activities of human bodies by capacitive, resistive and/or bio-impedance mode.
The most interesting sensing mode represents the pressure resistive sensor.
The sensor consists of two fabrics with an array of metallic conductive parallel stripes as electrodes and a third fabric as semi-conductive intermediate layer (see graphic).
As the sensor area is pressed, the resistance decreases (see graphic). The resistance-pressure relationship is predictable and repeatable and resistance is insensitive to other physical variables.
The fabric pressure sensor shows sensor function properties having by far the most sensitive structure in the response.
Sensing with fabrics
The PowerSens fabrics are woven fabrics usually consisting of PET and electrically conductive filaments.
PowerSens fabric properties
Able to sense physical quantities such as conductivity, temperature and elongation
Customer-specific designs
Electrical insulation available
Light weight (< 90 g/m2, filament diameters 40 – 80 µm)
High air permeability (> 8000 l/m2/s, depending on fabric design)
Compatible to injection mold processes
Examples of applications
Thin metal wire is embedded in the fabric as an endless serpentine weave
Breakage of the wire sets off the alarm
Electrically insulated wires in warp direction in combination with an intelligent contacting enable breakage detection of pipelines.
Your benefits
SEFAR PowerSens fabrics are customer-specifically developed and manufactured.
Physical quantities such as temperature, elongation, liquid levels etc. can be measured through Sefar fabrics.
Unobtrusive measurement of physical quantities
Fabric can be formed to fit any shape