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Inductive proximity switch - Are you interested in an inductive proximity switch and would you like to learn more about how it works and areas of application? Would you like to buy an inductive proximity switch and are you looking for a reliable supplier with a large selection at top conditions? In addition to information, the eibabo® shop also offers you high-quality articles in the field of Smart Home, lighting, switch programs and electrical material. Of course, this also includes inductive proximity switches and many other types of position switches and limit switches.What are inductive proximity switches?Inductive proximity switches are used to detect metal objects in the working area of a sensor and to signal this by changing the switching status.StoryThe physicist Michael Faraday first described the principle of electromagnetic induction in 1831. He found that changing magnetic fields create electric current.Proximity sensors are used for automatic non-contact detection of metallic objects for various industrial purposes and work reliably even under difficult conditions and various external influences. When the sensor is supplied with electricity, a magnetic coil inside generates an alternating magnetic field. This magnetic field is the working range of the sensor. The principle of operation is based on the phenomenon of change in vibration amplitude caused by a ferromagnetic, magnetic or metal object of a certain size in the working area of the sensor. If you bring a metal object into this area, the eddy currents induced in the metal lead to a change in the original oscillation amplitude of the coil. The intensity of the change depends on the distance between the metal object and the sensor. This change is presented as an analog signal and is converted into a logic signal with a corresponding value. The switch itself is a semiconductor converter, which controls the circuit to be executed depending on the position of the object.How are inductive proximity switches constructed?The electrical part of the sensor is typically housed in a threaded metallic cylindrical housing or a rectangular plastic housing. The cylindrical metal housing is assembled using the thread. To do this, they are attached to bores in mounting plates using nuts or screwed directly into the sockets provided for this purpose. The sensors with a rectangular housing are fastened with screws at the place of use. In order to be able to withstand the conditions of the industrial environment, the technology is usually surrounded by a protective sealant. TIPThe electromagnetic field of the inductive proximity switch is very weak and harmless to human health. The switches are available for both flush and non-flush mounting. Flush sensors can be mounted without protruding beyond the mounting surface. However, these generally have a shorter sensing range or more restricted working range than non-flush sensors.What properties do inductive proximity switches offer?The properties of the inductive proximity switches can vary depending on the model, manufacturer, structure and equipment. In general, the devices offer the following functions and properties:reaction to metal onlyInsensitivity to other materialsTightness against water and dust / correspondingly high degree of protectionReliability and durability because the switch's working surface is not in contact with the objectCompact dimensions and low weightTrip indicator LED Image: Schneider Electric XSAV11801 speed monitorWhere are inductive proximity switches used?Inductive proximity switches are robust and withstand shock, moisture, vibration and dirt. Within an automation process, inductive proximity switches work as the primary control elements, taking into account the position of certain metallic, moving objects. Proximity switches are used particularly frequently on assembly lines in special machine construction and plant construction. These are used there, among other things, for counting and tracking metal objects. But the devices are also used in warehouse logistics and conveyor technology, in the packaging industry and in the automotive sector. Depending on the application, the signals from the proximity switch are evaluated by a counter, a motion controller, an alarm system or other devices. In addition to numerous other functions, the following are also:distance measurements madeMaterial thicknesses and material widths determinedChecked surface texturePosition checks carried outCounting tasks taken over The classic example are bottles with crown caps or beverage cans, which are transported past the sensor and counted on a conveyor belt.What errors can occur with inductive proximity switches?The reliability of the measurements of an inductive proximity sensor depends on its properties, the way it is used, the installation and the nature of the objects to be detected. The two main errors are:The item is not recognizedIf the object is not detected, please check the sensor properties and all distances. Pay attention to the switching distances and the switching function (opener or closer). Is the correct operating voltage present? Is the item made of metal? Is the item big enough? Is the object moving too quickly through the work area?The sensor switches too early or too lateIf the switching time is not correct, this is often due to critical environmental conditions or electromagnetic interference signals. Is the sensor installed correctly (flush or non-flush)? Were other installation conditions observed? Are other switches that are in the immediate vicinity interfering? Is the sensor dirty? Check if other metals affect the work area.The inductive proximity switches in the eibabo® range are all of high quality and are therefore also suitable for your planned application. Well-known brand manufacturers for inductive proximity switches are Baumer, Dietz, Festo, Kisling, Leuze, Metz, Pilz, Rockwell, Turck, Weidmüller and many others.  Catalogue content:In this eibabo® catalogue Sensors > Inductive proximity switch you will find items from the following product groups:Item overview:Analog sensorCable sensorCuboid sensorDC voltage sensorFour-wire sensorInductive sensorObject detectionPlug sensorProximity initiatorProximity switchRound sensorThread sensorThree-wire sensorUniversal voltage sensorUprox sensorfrom the following manufacturers:Manufacturer overview catalogue Inductive proximity switch:BaumerBernsteinDi-soricDietzEatonEGE-ElektronikElobauFestoGavazziHengstlerIfm ElectronicIpf ElectronicKisslingKlaschkaLandefeldLeuzeMetzOmronPepperl + FuchsPilzRockwellSchmersalSchneider ElectricSensopartSickTurckWeidmüller
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