Jablotron SA-211 wired magnetic door contact
Stud mini contact with cable - extra thin.
Availability: In stock
Stud mini contact with cable - EXTRA THIN #216; 9mm, length - magnet 3 mm, relay 14 mm, working distance max. 19mm.
Door closed = normally closed (nc = 1k)
Door open = normally open (no = 2k ~ alarm)