Reed Switches
The Reed Switch, also known as Reed Contact or Magnetic Contact, is the ideal component for non-touch switching.
It is most economic switching component, handling loads from signal load up to 250 W in a wide range of applications.
Modified Reed Switch Solutions
Contact us if your application demands a tailor made Reed Switch solution - learn more about the possibilities for bespoke products here:
How does a Reed Switch work?
A Reed Switch consists of a pair of ferromagnetic reeds, overlapping at their free ends (contact area) at a very small distance and hermetically sealed in a glass tube. The contact area is plated with contact material such as Ruthenium or Rhodium. In presence of a magnetic field the reeds become magnetized the opposite polarity, thus attracting each other and closing contact.
Different forms of Reed Switches
Form A
Normally open, Reed Switch will close contact in presence of a magnet.
Form B
Normally closed. Either achieved by using a Form C switch with the NO wire cut off or by using an attached magnet (requires pole oriented actuation).
Form C
Change over, Reed Switch will change from NC to NO contact in presence of a magnet.
Form E
Latching type. Switching status remains stable after a magnetic field disappears until a magnet with opposite polarity approaches.
Reed Switch advantages
- No power supply required
- Contacts hermetically sealed
- Most economic non-touch switching solution
- Not ESD sensitive
- Various methods of actuation possible
- Magnetic and electrical pole independent
- Non-touch actuation permits smooth surfaces and
- modern design
- Various sensitivity ranges available
