Introduction
The SICK PRK 21000-28-05-15-028-04-02 is a specific model of a cylindrical, short-body inductive proximity sensor from SICK's extensive PRK 21000 product line. This sensor is designed for non-contact detection of metallic objects in industrial automation environments.
Operating on the eddy current principle, it generates an electromagnetic field from its active face. When a metal object enters this detection field, it causes a change in the sensor's internal oscillation, which is processed to switch its output state. This specific model is characterized by its M8 x 1 short-body housing, 5 mm sensing distance, and a flush-mounted design that allows for side-by-side installation without mutual interference. The "04-02" suffix typically indicates specific connector and cable options.
Parameters / Specifications
The key technical specifications for the SICK PRK 21000-28-05-15-028-04-02 are summarized in the table below.
| Parameter | Specification |
|---|---|
| Part Number | PRK 21000-28-05-15-028-04-02 |
| Product Line / Type | SICK Inductive Proximity Sensor |
| Sensor Type | Short-body, Flush-mounted (Shielded) |
| Sensing Distance | 5 mm |
| Housing Diameter / Thread | M8 x 1 |
| Output Type | PNP, Normally Open (NO) |
| Supply Voltage | 10-30 V DC |
| Switching Frequency | Approx. 1 kHz |
| Housing Material | Stainless Steel |
| Connection | M12, 4-pin connector (This is a key interpretation of the -04 suffix). |
| Cable Length | 2 meters (This is a key interpretation of the -02 suffix). |
| Degree of Protection | IP67 |
| Housing Length | Approx. 25 mm (excluding connector) |
| Weight (Approx.) | 0.03 lbs (0.015 kg) |
Note: The exact interpretation of suffixes should be verified with the official SICK datasheet for this exact part number.
Application Scenarios
This compact inductive sensor is a fundamental component in automated systems due to its small size, reliability, and resistance to harsh environments.
Typical application scenarios include:
Position Verification in Tight Spaces:
Detecting the presence or position of metal parts on compact machinery, small actuators, or within confined robotic end-effectors where standard-sized sensors cannot fit.
End-of-Travel Detection on Compact Cylinders:
Mounted directly onto small-bore pneumatic or hydraulic cylinders to provide precise feedback on the piston's position, confirming the end of its stroke to the PLC.
Part Presence Detection in Assembly:
Used in automated assembly lines and palletizing systems to verify that a metal component is present and correctly positioned before the next step in the process can proceed.
Counting and Sequencing:
Counting small metal components, such as fasteners or electrical contacts, as they pass a point on a high-speed production or packaging line.
Industries of Use:
Automotive Manufacturing
Packaging Machinery
Electronics and Semiconductor Manufacturing
Machine Tool and Robotic Automation
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