CQ35-25NNP-KC1, SICK, rectangular capacitive sensor, 4–25mm, NPN, connector M12 4pin

CQ35-25NNP-KC1, SICK, rectangular capacitive sensor, 4–25mm, NPN, connector M12 4pin

CQ35-25NNP-KC1 (SICK 6021464) is a rectangular capacitive sensor with adjustable sensitivity. Sensing distance 4 mm–25 mm, NPN output; electrical connection Connector M12, 4-pin. The suitability for detecting a specific material is verified in the real installation.

Technical specifications

Working principle of a capacitive sensor

A capacitive sensor creates an electric field in front of the active face. An approaching material changes the capacitance of the measuring system and the electronics evaluate the switching state. Unlike an inductive sensor, it can also respond to non-metallic materials such as plastic, glass or liquid. The actual sensitivity depends on the material properties, humidity and installation geometry.

Typical applications of this variant

The flat rectangular design is installed on the side of equipment or in confined places. To check the presence of material, the sensitivity must be adjusted to the target object and the surrounding structures.

Mounting and sensitivity adjustment

Installation: Non-flush. The effective range may differ between flush and non-flush installation. Set the sensitivity for the actual material, distance and surrounding metal parts. Before replacing with another sensor, check not only the size but also PNP/NPN, NO/NC, supply and wiring.

Wiring and correct selection

For the control system, check the compatibility of the input with the output NPN, the supply voltage and the assignment of wires or pins. Different variants of the series may have different connectors, cables and contact functions.

FAQ

Does the sensor detect only metal? No. The capacitive principle can also detect non-metallic substances; the effective distance depends on the material.

What is important when choosing a replacement? Order number, shape and mounting, range Sn, output, supply and the exact connection.

Is the stated distance always achievable? No. The manufacturer's parameter applies under specified conditions; after installation we recommend testing the detection of the specific target.

TECHNOLINE – technical note: The rated range is not a universal detection distance for all materials. For safety-critical applications, first verify the conditions in the manufacturer's datasheet and on the equipment.