Stretch/ tension sensor

Hi all,

I am starting my senior project and have been given the task of measuring the tension put on a physical therapy band during a therapy session. This data must be exported and put into a file that is readable by the therapist. I am not sure what type of sensor would be best to use with my Arduino, whether it be a stretch sensor or a tension sensor. Any help would be appreciated.

Thanks,

Tony

You need an electronic spring scale. http://commons.wikimedia.org/wiki/Spring_scale

Google for pictures of : portable digital fish hook scale

But i don't know the technology inside of those. Perhaps a load cell ?

Suggest you have a look at Force Sensitive Resistors such as shown here http://www.openmusiclabs.com/learning/sensors/fsr/