Proximity Sensors

from leading manufacturers

Proximity Sensors enable contactless detection of the nearby objects. Lack of both physical contact and moving parts result in their high reliability and long service life. They enable fast and stable detection of metal and nonmetal objects also in harsh industrial environments.

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Reliably detect the proximity of the object

TURCK proximity sensors

Proximity sensors, the most basic and widely used input devices in industrial automation, provide information in the form of individual process state to controllers. They convert information on the movement or presence of an object into an electrical (a logic) signal. From our wide range of proximity sensors choose the ones that perfectly fit the needs of your application.

Pick the top-quality sensors manufactured by leading companies:

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Take advantage of many qualities of Proximity Sensors

  • They do not cause abrasion or damage to the object as the object is detected without any physical contact,
  • They provide high-speed response, compared with switches that require physical contact,
  • They ensure maximum operational safety and guarantee virtually unlimited service life due to the absence of wearable mechanical parts e.g., actuating mechanisms and contacts,
  • They boast water-, contamination- and impact (vibration and shock) resistance, contact burning, and contact contamination caused by ambient influences cannot occur,
  • They can be used in a wide temperature range.
  • lessen the chances of downtime and increase operational efficiency,
  • get more out of your purchase and potentially reduce costs,
  • optimize peak performance.
LEUZE proximity sensors

Choose a perfect type of Proximity Sensor for your application

Several types of sensors are available, each with its unique advantages that allow you to meet a great variety of purposes:

In industrial automation, inductive proximity sensors are one of the most common types of proximity sensors. In addition to the resistance to industrial influences stated above, they also feature resistance to dirt and dust. They are used for a low-cost detection of different metal objects, e.g., copper, aluminium, stainless steel and steel. Moreover, first carbon detection models are allready available.

These sensors operate by using the principle of electromagnetic induction. They detect magnetic loss due to eddy currents that are generated on a metallic object.

As they come in many formats, housing materials and wide range of switching distances (up to 70 mm), you can effectively use them in a great variety of applications.

Capacitive proximity sensors reliably detect presence or absence of virtually all objects or materials, i.e., all solids, bulk goods, liquids, metals, and non-metals. As they are non-contact, reaction-free and work through container walls, there is no wear.

These sensors operate by detecting changes in the capacitance between the sensor and object. The distance and the size of object affect the amount of capacitance. Based on a change in the electrical field around its active surface, the sensor detects the object.

A typical sensing range for capacitive proximity sensors is from a few millimetres up to about 30 mm.

The potential uses of these sensors are as diverse as the available designs. Whether in the plastics, chemicals, packaging and many other industries, capacitive proximity sensors guarantee accurate detection. Where capacitive sensors really excel, however, is in applications where they must detect objects through materials, e.g., through a bag, bin, or box. They can tune out non-metallic containers and can be tuned or set to detect different levels of liquids or solid materials.

Although many media and objects make detection by sensors difficult, metals or non-metals, as well as transparent, liquid, and powdery surfaces are usually reliably detected by ultrasonic proximity sensors. They are typically used for stable detection of transparent objects, such as transparent films, glass bottles, plastic bottles, and plate glass.

These sensors operate by detecting the presence of objects through emitting high-frequency ultrasonic range. They do so through the conversion of electrical energy. Piezoelectric ceramics are used for ultrasonic transmission and reception.

To ensure ideal adaptation to your application, many variants of ultrasonic sensor exist that feature temperature compensation, interference suppression for external noises and other options. Sensing range for ultrasonic proximity sensors is from few centimetres up to about 8 m.

Magnetic-inductive proximity sensors are proximity devices used to detect magnetic objects through their large sensing ranges. Though it merely senses magnets, it’s still great for its low cost, long-range, and small dimensions.

Magnetic inductive proximity sensors are actuated by magnetic fields and are thus capable of detecting permanent magnets through non‐ferromagnetic materials (e.g., wood, plastic, non‐ferrous metals etc.).

They come in handy especially for the contactless detection of the piston position in pneumatic cylinders. But there are also application-specific sensor types available for use in welding or Ex-areas.

Check out common applications of Proximity Sensors

Since proximity sensors can easily withstand both standard and harsh industrial environments, they are suitable for wide range of applications:

  • Production automation machines that count products, product transfers
  • Standard object position detection
  • Inspection and quality assurance
  • Process control
  • Fluid level, and pressure detection
  • Transportation, logistics, and supply chain
  • Food processing and manufacturing
  • Detection of metal objects, armoury, land mines, etc.
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