WORKING PRINCIPLE  
Magnetic proximity switches are made of reed contacts whose thin plates, trapped in a glass bulb together with inerted gas, are easily influenced by magnetic fields that create magnetic induction, opposite polarization. Magnetic attraction force makes thin plates flex and touch each other causing an electrical contact. The plate's surface has been treated with a special material particularly suitable for low current or high inductive circuits. Magnetic sensors compared to traditional mechanical switches have the following advantage:  
- Contacts are well protected against dust, oxidization and corrosion thanks to the hermetic glass bulb and inerted gas; contacts are activated by means of a magnetic field rather than mechanical parts.  
- Special surface treatment of contacts assures in normal electrical conditions many of working cycles.  
- Maintenance free, reduce encumbrance. The reed magnetic switches offer many electrical and mechanical characteristics together with various output functions.  
- When in normally open (N.O.) mode the open reed contact closes as magnet approaches. They are supplied with two wires.  
- When in the normally closed position (N.C.) the Redd contact, in rest position, opens as magnet gets closer. These models are created by using exchanging reed contacts in which N.O. output has been excluded. They are supplied with two wires.

Voltage (V), switching current (I) and max. power (P) mean the max. switching istantaneous value in presence of loads. When choosing a type of contact it is recommended that the following formula be applied: P = V x I.  
For magnetic sensors which have different technical data from shown standard ones and for the switching of inductive or capacitive loads our technical department is always at your disposal.