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.
Magnetic reed switch symbol.
In the lift switchgear section you will find lift switchgear for various applications in the shaft pit the lift car and the machine room.
A reed switch consists two reed contacts typically made from nickel iron and then plated with materials to ensure the maximum life to the device.
The reed switch contacts overlap so that when they close they make contact with each other.
The basis of any reed relay is the reed switch itself this is the core element of the reed relay.
Most of the time a small voltage or current is used to switch other voltages or higher currents that may be electromechanical or fully electronic type.
Actuating surface and direction of actuation marked by switch symbol.
Symbols of electronic sensors transducers detectors.
Horizontal symbol vertical symbol description hpx1m vpx1m magnetic hpx11m vpx11m magnetic proximity switch normally open hpx12m vpx12m magnetic proximity switch normally closed hpx11m3 vpx11m3 normally open 3 wire hpx11m3r vpx11m3r normally open 3 wire 180 hpx12m3 vpx12m3 normally closed 3 wire hpx12m3r vpx12m3r normally closed 3 wire 180 hpx11m3c vpx11m3c normally open 3 wire with connector.
Relay symbols and electromagnets.
The contacts are usually normally open closing when a magnetic field is present or they may be.
Littelfuse offers the widest selection of magnetically operated reed switches.
Options for customization such as lead cutting and forming are available.
By adding an additional nonmagnetic contact that is electrically closed with no magnetic field present a single pole double throw switch can be made.
Standard electrical iec symbols also known as iec 60617 british standard bs 3939 used to represent various devices including pilot lights relays timers and switches for usage in electrical schematic diagrams.
Reed switches are available in bare glass or overmolded packages with a variety of mechanical electrical and magnetic characteristics.
The basic reed switch is a single pole single throw normally open switch also known as a spst no or form a switch.
Currently only available as pdf catalogue.
Floor and fine adjustment switches positive break door contacts position switches magnetic reed switches remote alarm systems as well as the usp ultrasonic elevator positioning system.
The transducers sensors and electrical and electronic detectors are elements activated by the energy delivered by a system and that in turn deliver another type of energy to another different system the transformed energy may be of physical chemical or biological origin.
The relay are switching devices activated by signals.
