You mean a CO detector. Ironically, what you'll want to do is find some O (oxygen). Open windows, and/or go outside.

In your case, it looks like their is an open stairway next to it. If so, could be there as added safety to help prevent the dryer from tumbling.

(Sorry for the pun. I'll show myself out...)

EDIT: just realized the photo is an example, not yours specifically.