Presence Sensing is the act of identifying the presence or absence of any material with a contact or non-contact sensing device.
. The equipment or processes is controlled by the sensors which produces an electrical output signal.
Limit switch manufacturers make these devices which are a type of sensor that detect presence and absence. Particularly, mechanical limit switches can be activated mechanically. In context, they have some sort of mechanical equipment like arm, lever, knob, plunger, etc., which can be physically—or mechanically—activated by making contact with another object. Whenever the object makes contact with the actuator of the switch, it ultimately pushes the actuator to its “limit” where the state of the contacts is changed. There are different varieties of sensors/switches which exist in market, includes proximity sensors, light sensors, electric switches, among others.
In industrial applications for detecting the presence or position of objects, mechanical limit switches are extensively used as contact sensing devices. The operation of the device itself derives the term limit switch. Whenever a particular object or target makes contact with the switch operator, it will eventually move the elevator to its limit where the electrical contacts change state.
The electrical contacts are either opened (in a normally closed circuit) or closed (in a normally open circuit) by performing this mechanical action. Inductive proximity, capacitive proximity, and photoelectric sensors achieve this same method through noncontact sensing.
In its simplest form, a limit switch is a “switch” produced by these manufacturers that can be mounted into isolated locations so that it is actuated by a thing other than a human operator. Some basic functions of limit switches that manufacturers ensure are:
…and hundreds of other submissions
Mechanical limit switches can be found in any industrial or commercial application where detection or safety is needed.
Limit switches manufacturers believe them to be a hands-on solution for sensing in most situations.
Benefits of Limit Switches
Limit Switch Functional Parts :
Mostly, limit switches contain the following functional parts in one form or another.
Actuator/Operating Head
The actuator is the part of the switch whose function is to contact physically with target. To open or close the electrical contact of the switch, the actuator is attached to the operating head upto perpendicular motion in some switches.
Switch Body
The constituent comprising the electrical connection device.
Receptacle/Terminals
This component contains the terminal screws or screw/clamp assembly which are necessary for wiring purposes. While there are a number of different styles of limit switches available in the market today, this physical will describe two classes of limit switches — standard industrial oil tight and precision switches.
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