SparkFun will be closed Friday 7/3/2020 for the 4th of July holiday. All orders placed after 2 pm MT on Thursday 7/2/2020 will be shipped out on Monday 7/6/2020. SparkFun Support will also resume on Monday 7/6/2020. Have a safe holiday!
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 ~300k. 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 8.5". Sensor comes with 0.1" spaced, reinforced, breadboard friendly connector.
This sensor comes in three flavors. This sensor ranges from 0 to 100lbs of pressure in the mega-ohm range.
For information on how to calibrate your sensor go here => http://www.tekscan.com/how-do-i-calibrate-my-flexiforce-sensor.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
See all skill levels
Based on 3 ratings:
1 of 1 found this helpful:
It does what it's supposed to do. Quite reliable in terms of linearity, but drifts a lot with time...Very noisy in low (<3-4kg) forces. Cannot compare to load cells, but it's a good, cheap, alternative
This product works well for instantaneous pressure readings BUT not for near constant weight. Drift is a big problem which needs constant adjustment. Hysteresis on decreasing weight is almost unworkable. The datasheet explains these but these errors are considerable. I emailed TEKSCAN for an equation for log time drift but received with no answer. I had to derive my own. During install, one of the four sensors was damaged. These things are very fragile. It is important to build a sturdy harness. The long flexible lead is a drawback for this product. I switched to load cells taken from a $10 bathroom scale and an HX711.
Good range with a simple set up