Contact sensor on shutters

I need to install a contact sensor on the inside of a shutter. Do I need to use the chunkier and more expensive outdoor sensor or a standard one will be fine? As it’s on the inside of the shutter, it’s protected from rain. But I’m worried about the temperatures in winter. Also, if the outdoor one is required: I need an additional magnet as that I can set the alarm on “home” even when this shutter is open, but you can only buy a spare magnet for the indoor sensor. Will the indoor magnet work with the outdoor contact sensor? Thanks!