What is a magnetic Reed Switch used for?
What is a magnetic Reed Switch used for?
A reed switch is an electromagnetic switch used to control the flow of electricity in a circuit. They are made from two or more ferrous reeds encased within a small glass tube-like envelope, which become magnetised and move together or separate when a magnetic field is moved towards the switch.
How do magnetic reed switches work?
How Does a Reed Switch Work? The switching mechanism is comprised of two ferromagnetic blades, separated by only a few microns. When a magnet approaches these blades, the two blades pull toward one another. Once touching, the blades close the normally open (NO) contacts, allowing electricity to flow.
Where are magnetic reed switches commonly used?
Reed switches actuated by magnets are commonly used in mechanical systems as proximity sensors. Examples are door and window sensors in burglar alarm systems and tamperproofing methods. Reed switches have been used in laptops to put the laptop into sleep/hibernation mode when the lid is closed.
What is a characteristic of a magnetic Reed Switch?
A magnetic Reed Switch is inherently immune to mechanical wear. A unique characteristic of magnetic reed sensors, or switches, is their capability to support high-speed switching applications without mechanical wear.
Does a reed switch need power?
In contrast, reed switches are passive components that do not require any power to operate.
What is the difference between micro switch and reed switch?
Reed switch contact options include normally open, normally closed, and single pole, double throw (SPDT). Micro- and nano-power solid-state switches do not operate continuously. Reed switches do not sleep, so they can be used at speeds of hundreds of times per second.
How do you activate a reed switch?
Although a reed switch can be activated by placing it inside an electrical coil, many reed switches and reed sensors are used for proximity sensing and are activated by a magnet. As the magnet is brought into the proximity of the reed sensor/switch, the device activates.
What is a magnetic reed switch?
The reed switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936 by Walter B. Ellwood.
What is magnetic switch normally open?
The SWITCHES are normally open, and closed when the magnet activates the switch. A Normally OPEN system is a parallel string circuit – where the normally CLOSED switches are activated when the doores are closed and the magnet is close – and ANY ONE switch being CLOSED activates the system.
What is a balanced magnetic switch?
A Balanced Magnetic Switch (BMS) is used in high security applications. The device incorporates five reed switches, as shown in the X-ray view. Proper placement of three magnets, shown inserted between the reed element and activator, can defeat this switch.
What is a magnetic position switch?
A magnetic switch is just like a light switch: it turns a circuit on or off depending on what position the arm of the switch is in. The only difference is that a magnetic switch is operated by a magnet, rather than your fingers.
