How does a Reed Switch work?
![Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch](../upload/202209/1663672299199319.png)
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.
ACTUATING A REED SWITCH
In general four different magnet approaches are known when using permanent magnets.
ONE POLE ACTUATION
One magnet pole faces Reed Switch providing two operations max. when moving on X-axis. Minimum movement of magnet over switch center provides smallest possible switching differential.
![Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch](../upload/202209/1663672302427799.jpg)
TWOPOLE ACTUATION
Approaching magnet vertically to switch on Y-axis provides one operation only. Driving magnet over the full length of the switch (X-axis) may result in up to three operations. Minimum movement of the magnet over switch centre provides the smallest possible switching differential.h.Properties and behaviour of Reed Switches and Reed Sensors.
![Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch](../upload/202209/1663672304557899.jpg)
ROTATION
Rotation of the actuating Magnet: Two switching cycles per full turn of the Magnet.
![Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch Beelee,Vibration sensor,tilt sensor,hall sensor,reed switch,Temperature sensor,Proximity Switch,liquid level switch,Photoelectric tilt switch,Vibration switch](../upload/202209/1663672306671520.jpg)
SHIELDING
Operation of switch by shielding. This method requires a permanently opposite location of magnet and switch. The switch is held closed continuously and will release only if magnet flux is removed by means of ferro-magnetic shield.