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Description: This is a piezoresistive force sensor from Tekscan. The harder you press, the lower the sensor's resistance. Pressing hard, the resistance changes from infinite to ~50k. The sensor itself is thin and flexible, but the resistance does not change while being flexed. Resistance changes only when pressure is applied to the round area at the end of the sensor. Used as a presence sensor (someone standing), weight sensor, pressure sensor (impact testing), etc.

The overall length is about 2.25". The sensor comes with a 0.1" spaced, reinforced, breadboard friendly connector.

This sensor ranges from 0 to 25lbs of pressure.

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Comments 10 comments

  • This has a sensor area of about ¾ square inch (the “one inch area” is clarified as diameter in the data sheet), making the “weight” measured by the pressure sensor (what a weird way to spec) close to two pounds per fathom of water. So the “25 pound” rating can measure up to the pressure of a little more than 70' of water.

    Which raises the obvious question: is the sensor end of this waterproof? The datasheet gives no insight on this, but it is pretty clear from the picture that the wire end is not unless additional treatment is applied.

  • I need to connect this sensor to a PCB using a receptacle-connector. I didn’t a see spec for the flat pin dimension from the manufacture, but i measured them to be ~0.1" (2.54mm) apart.

    Does anyone know of a 2-position flat pin receptacle for this sensor? (through-hole)

  • BUYER BEWARE, The description says “The sensor itself is thin and flexible, but the resistance does not change while being flexed. ” However, when flexed the resistance changes by a very large amount.

  • I had a look at Bildr Tutorial & your Quickstart Guide, you guys are using a positive supply to the sensor but the manufacturer recommend a different setup using a negative supply with a inverting op-amp. Have you tested if the positive supply effects the accuracy of the sensor?

    • This sensor is a variable resistor, and there are a number of ways to measure resistance. We like using it in a voltage divider because of the simplicity of the circuit. The advantage of an op-amp design is that it buffers the voltage output for high impedance. Both techniques have their place; use whichever one is appropriate for your application.

  • How long will it take to ship the item to Malaysia? And this is a Strain gauge right?

  • When I connect two of these to the arduino, one on pin A0 and the other on pin A1, if I press on one sensor, the second sensor’s resistance changes also. How do I wire these up so that each sensor registers it’s own reading independent of the other? I currently have them wired according to the examples above.

  • Will this sensor register a small pressure size, say from the end of a ball point pen? Or will this sensor only register large distributed forces?

    • The sensor will register pressure as long as it is inside the sensing area (in this case, the gray circular end). If you are only looking to sense pressure from something as small as a pin, we do have other force resistors with smaller sensing areas-check the related products below.


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