KR-21-PSK-ST4 Dietz Capacitive Ring Sensor, 21.1 mm, Axial M12, PNP/NO

The Dietz KR-21-PSK-ST4 is a 21.1 mm capacitive ring sensor for contact-free detection of liquids, pellets, powders, small parts and other materials passing through plastic or glass tubing.

Detection depends on the dielectric difference created by the target material within the sensing field. Material composition, density and the tube itself can influence sensor response, so object size alone does not determine whether reliable detection is possible.

The KR-21-PSK-ST4 features adjustable sensitivity, a PNP normally open output, and an axial M12 connection. Sensitivity can be tuned to suit the target material, tube wall thickness and application conditions.

Applications

Typical applications include:

• liquid presence detection through plastic or glass tubing
• plastic pellet and plastic ball detection
• wooden part detection
• powder and granular material monitoring
• small-part detection in feeding tubes
• material presence/absence monitoring
• feeder tube blockage or interruption monitoring
• automated feeding and packaging equipment

Reliable detection depends on whether the target material creates sufficient dielectric change within the sensing field.

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