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:

Customized Products

 Modified Reed Switches - Cut and/or Bent - Latching and Bistable
Function principle of a Reed Switch

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

Form A

Normally open, Reed Switch will close contact in presence of a magnet.

Form B - Normally Closed

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

Form C

Change over, Reed Switch will change from NC to NO contact in presence of a magnet.

Form E - Latching

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
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