Gun trigger force sensor

Hello everybody!

I do precision shooting and during training we use a machine that indicates the pressure we apply on the trigger. Since it is super expensive i want to try and build one, i think it's an easy project. My only problem is to find a way to calculate the applied force on the trigger. Which sensor would be the best? I've excluded load cells since they are too big, a FSR is much better because being that thin i can simply glue it on the trigger. My fear is that this kind of sensor isn't accurate enough. I need something that can record an interval of about 5/10 grams and a maximum weight of 600g (~6N).

Thank you in advance

Look for strain gages they come in sizes from large to very small and in general are very reproducible and accurate.

wade

My idea is to put a small film on the trigger to be able to measure finger pressure
Is this feasable with a strain gauge? Doesn’t it measure extentions/compressions?