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Capacitive proximity sensors (CPS) are sensing device designed to detect both metallic and nonmetallic targets. They can detect lightweight or small objects that cannot be detected by mechanical limit switches. CPS are ideally suited for plastics and other nonmetallic targets, for liquid level control and for sensing powdered or granulated material.
A capacitive proximity sensor uses dielectric principles of capacitance to establish a sensing field (depicted as the yellow circles in the drawings below) in the vicinity of the face of the sensor that creates a detection zone.
A detection occurs and the sensor switches on when a target in the vicinity of the sensor disturbs that field and reaches the Operate Point. The sensor switches off when the target moves away from the sensor and reaches the Release Point.
A capacitive proximity sensor does not need to come into physical contact with the target itself.
Deciding which sensor to purchase and selecting the right one for your application can be a confusing task. However, the decision is important and the successful application of the sensors depends on the selection of the appropriate technology for the application.
Visit our page to learn how to select the right sensor.
Not sure if Eaton sensor and limit switch solutions are right for you? You can request samples of Eaton sensors FREE OF CHARGE to test them with your machine applications. We will make our Eaton experts available to assist with product selection and provide technical guidance so that you choose the right sensor for your needs.
| Sensor housing diameter | Capacitive proximity sensing range |
| 18 mm | 10 mm |
| 30 mm | 20 mm |
| 34 mm | 40 mm |
| Material | Factor X Sn |
| Mild steel | 1.0 |
| Cast iron | 1.0 |
| Aluminum & copper | 1.0 |
| Stainless steel | 1.0 |
| Brass | 1.0 |
| Water | 1.0 |
| PVC | 0.5 |
| Glass | 0.5 |
| Ceramics | 0.4 |
| Wood | From 0.2 |
| Oil | 0.1 |
