From: John Wann <john1@HMS01.HMS.UQ.OZ.AU>
Subject: TECH: Using Interlink FSR sensors

Tarun Kripalani was seeking pressure sensitive resistors.

Regarding the "InterLink"  FSR  pressure sensors. These are very 
neat looking devices. Unfortunately, last time I looked at them 
(about 2 years ago) I perceived a problem in using them to sense 
human manipulation.  The devices gave a linear output for forces 
above 100g (1N), but were markedly non-linear below 1N.  
Depending on what you want to use them for this may be a 
problem as many manipulative forces are in the range 0-2N and I 
couldn't think of a suitable way of "pre-loading" the device.  This 
limitation may have changed now, so check it out with InterLink.  
If you want to measure grasp force etc... they may not be suitable 
unless you can design a clever pre-load mechanism. They would 
be fine as minimal weight on/off switches.

John Wann
Edinburgh Variable Resistor Project