Inductive Proximity Switches
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	Main Page / Proximity Switches / Inductive Proximity Switches / Details
	Inductive sensors are used when the target is metal. These are the most widely used switches in industry today. Proximity switches are available in either Shielded or Unshielded versions. Shielded versions will detect metal only at the sensing face. This means they can be flush mounted up to the end of the proximity switch, and will not sense the surrounding metal. Unshielded versions usually have a larger sensing range, but the drawback is that they will detect metal around the sensing head. This means that the surrounding area (normally 3 times the switch diameter, and twice as deep as the sensing range) must be free from metal objects. Technical Information An inductive proximity switch consists of 4 main components: coil, oscillator, detection circuit and solid state switching device (transistor in DC switches, thyristor in AC switches). The oscillator creates a high frequency field that is emitted from the sensing face. When a metal target enters that field, eddy currents are induced in the metal target (hence the term INDUCTIVE). Energy is required from the oscillator to maintain the eddy currents in the target. As the target enters the sensing range of the sensor, the energy required becomes too great for the oscillator, and it stops. The detection circuit senses this and signals the switch to change state. After the metal target leaves the sensing range, the oscillator resumes functioning, and the switch returns to its normal state (either Normally Open or Normally Closed). Variety of Styles and Shapes Inductive switches are stocked in a variety of styles and shapes. Some of the most common configurations are: Round 6.5 mm diameter smooth body 8 mm diameter (M8 x 1 thread) 12 mm diameter (M12 x 1 thread) 18 mm diameter (M18 x 1 thread) 30 mm diameter (M30 x 1.5 thread) Square 12 mm x 12 mm face 17 mm x 17 mm face 20 mm x 20 mm face 25 mm x 25 mm face 30 mm x 30 mm face 40 mm x 12 mm face An information sheet including Selection Guide and Specifications will be sent on request. Details --> Inductive Analog Sensor MKZ 471 | Inductive Ring Sensor | Inductive Analog Sensor MKK 050