I think you mean the proximity Sensor? and the Accelerometer?

I don't think you can turn them off. Don't see why you would need to anyway. Accelerometer is used for judging direction and stuff. It's how apps like pedometers work. And if you are talking about the proximity sensor. The only thing i know that it does is make your screen dark when you hold it next to your ear.

 

You can turn off the Accelerometer or Auto Rotate by going to
Menu >> Settings >> Display >> and untick Auto Rotate.

Atleast i think there the same thing, correct me if im wrong.

 

Can't turn proximity sensor off...yet

but you can turn auto rotate off.

 

I'm sorry bigal23, just to make it clear...it is big-al-23 and not bi-gal-23 right? shows that ive been tainted in my past internet surfing lol