Where are Capacitive Sensors Used?

Image of SICK Capacitive SensorsCapacitive proximity sensors are non-contact solutions used to detect liquids, bulk materials and other non-metallic objects behind surfaces, including walls, storage containers, or covers.

Capacitive sensors are most commonly used for level and feed monitoring applications in food and beverage, automotive and warehouse environments. Their resistance to harsh environmental factors, such as dirt, make them reliable for a variety of applications.

In particular, capacitive proximity sensors are ideal for detecting the following:

  • Aggressive, contaminated media through plastic walls
  • Objects that absorb a high amount of light, such as wafers
  • Shiny or reflective objects, such as mirrors
  • Objects through packages

Get the most out of your capacitive sensors

With a variety of application factors to consider, how can you make sure you’re getting the most out of your capacitive sensor? Check out the 4 tips below:


Tip 1Tip 2
Grounded and conductive targets provide maximum detection reliability and operating distances.If the sensors sensitivity is adjusted too high - to the maximum setting - the sensor can lock on, meaning it does not switch off. Therefore, the sensitivity has to be reduced.
Tip 3Tip 4
A capacitive sensor can detect objects through non-metallic walls. This is the electrical permittivity of the object/medium behind the wall is higher than the electrical permittivity of the wall.The detection is mainly influenced by the distance between the active zone of the sensor and the object/medium, the size of the active zone and the electrical permittivity of the object/medium.


SICK offers a range of capacitive proximity sensors with sensing ranges from 1 to 25 mm. For more information about SICK’s entire portfolio of capacitive proximity sensors, download this overview of Capacitive Proximity Sensors.

Want to learn more about this solution? Contact a SICK Representative today!

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