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A magnetic switchable device (often called a magnetic base) is a magnetic fixture that uses one or more permanent magnets in a configuration that allows the external field to be turned on or off. They are used in many applications including optics , metalworking , lifting , and robotics, to attach items to metal surfaces in a secure but ...
Bipolar switches have a positive B OP and a negative B RP (and thus require both positive and negative magnetic fields to operate). The difference between B OP and B RP tends to be greater for bipolar switches described as latches, which remain in one state much longer (i.e. they latch onto their last value) and require a greater field strength ...
The reed switch [i] is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [ 1 ] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay.
Magnetic switch. Magnetic switch is an electrical switch that makes or breaks contact in the presence of a magnetic field.Applications include situations where it is not desirable or possible for moving elements to make direct contact with the switch, such as in explosive environments, submerged in liquids, and where repetitive contact with a mechanical switch would result in undesired wear.
Functional magnetic resonance imaging; Glass break detector; Heartbeat sensor; Hyperspectral sensors; IRIS (Biosensor), Interferometric Reflectance Imaging Sensor; Laser beam profiler; Littoral Airborne Sensor/Hyperspectral; LORROS; Millimeter wave scanner; Magnetic resonance imaging; Moire deflectometry; Molecular sensor; Nanosensor; Nano ...
A solid state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals. They serve the same function as an electromechanical relay , but solid-state electronics contain no moving parts and have a longer operational lifetime.
by assuming that the induced magnetic field B is homogeneous over a section S (the magnetic flux will be expressed =). One form of inductive sensor drives a coil with an oscillator . A metallic object approaching the coil will alter the inductance of the coil, producing a change in frequency or a change in the current in the coil.
However, they have relatively low switching current and voltage ratings. Though rare, the reeds can become magnetized over time, which makes them stick "on", even when no current is present; changing the orientation of the reeds or degaussing the switch with respect to the solenoid's magnetic field can resolve this problem.
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