Panametrics Systems I Hygrometer Panel Face w/ Housing # 1E-221-111-100-111
Got this from a government lab. Do not know much about these. Other models sell for lots. This is a hard to find model. I do know that this is missing all the cards and the lock mechanism. YOu are bascially buying the frame/housing and the panel interface.
No back to this as well.
But I will try to answer your questions the best I can....