Sensor for measuring tension?

I'm looking for a sensor that can measure tension. Essentially, I want to attach a string to it and be able to read out values from the sensor which change as I pull it.

Anywhere I can find something like this? I've tried searching 'tension sensor' but not getting any obvious results.

Thanks!

timex40:
I'm looking for a sensor that can measure tension. Essentially, I want to attach a string to it and be able to read out values from the sensor which change as I pull it.

Anywhere I can find something like this? I've tried searching 'tension sensor' but not getting any obvious results.

Thanks!

Try these terms:- "load cell", "strain gauge".