Reed contact, A reed contact is activated contactlessly by a permanent magnet. The reed contact is, for example, inserted or placed in a door frame and the magnet in the door leaf. When the door is closed, the magnet acts on the contact (contact closed). However, if the door is opened beyond the corresponding switching distance, the contact is interrupted (contact type normally open) or, in the case of the contact type changeover, the contact is switched over., Suitable for surface and recess installation on/in wooden or aluminum windows and doors., Complete set, Suitable for all installation conditions thanks to the different fastening parts of the set, changeover