turn off sensors

I am interested in "turning off" the sensors (gps, temperature, hrm ...) when I deem it necessary.
From ide trying to turn off the hrm sensor it seems to me that it reactivates independently, probably some app calls an activation.
If I make an app that turns off the sensors is it bypassed by these other calls?
Is there a risk of doing unnecessary work?
Is there a solution to this need?

Thanks!