This material changes it's resistance when it is under pressure and is perfect for making cheap and easy sensors! This particular product is called Linqstat but identical to another product called Velostat.
Great for wearable projects and flexible sensors.
This sheet is large enough to do up to 100 fingers!
Dimensions: (300mm x 300mm)
Temperature Limits: -45°C to 65°C (-50°F to 150°F)
Heat Sealable: Yes
Volume Resistivity : <500 ohm-cm
Surface Resistivity : 50,000 ohms/sq.cm
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