flexiforce sensor please help me

Hi

I tried to calibrate the flexiforce sensor but i couldn't get a linear conductance graph although I followed all the steps provided in the user manual [www.cytron.com.my] ... Manual.pdf .
Furthermore, it does not gives stable reading when I conditioned/calibrated it. The resistance value kept on decreasing although if I waited for 3 minutes. Besides it also didn't give the same reading although the same amount of weight placed on it.

What should I do? Does this means the sensor has broken/damaged?

Thanks

Hi,

what are you using exactly. Is it a straingauge like this http://en.wikipedia.org/wiki/Strain_gauge?

I've used this a while ago in a project and the best way is to use a weatstone bridge (http://www.allaboutcircuits.com/vol_1/chpt_9/7.html) with 2 strains.

Those strains are verry sensitive to temperature, strain, pressure, .... so it's possible that multiple readings aren't the same value.