The Reed Switch, also known as Reed Contact or Magnetic Contact, is the ideal component for non-touch switching.
It is most economic, handling loads from zero load up to 250 W in a wide range of applications.
How does a Reed Switch work?
A Reed Switch consists of a pair of ferromagnetic reeds, hermetically sealed in a glass tube. Their free ends overlap
at a very small distance.
Different forms of Reed Switches
Normally open, Reed Switch will close contact in presence of a magnet.
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).
Change over, Reed Switch will change from NC to NO contact in presence of a magnet.
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