A. Product Overview

The Autonics PR18-8DP2 is an M18 inductive proximity sensor designed to detect metallic objects without physical contact.

It is commonly used in industrial machinery where reliable position detection, presence sensing or metal object detection is required.

This model provides an 8 mm sensing distance and a PNP normally closed output. The normally closed output configuration is useful in applications where the output remains active under normal conditions and changes state when a metallic target enters the sensing area.

Key Features

• Brand: Autonics

• Model: PR18-8DP2

• Series: PR

• Product type: Inductive proximity sensor

• Sensor shape: Cylindrical

• Thread size: M18

• Sensing distance: 8 mm

• Output type: PNP

• Output operation: Normally closed

• Detection method: Inductive

• Detectable target: Metallic objects

• Detection type: Non-contact

• Suitable for PLC based automation

• Suitable for machine position detection

• Suitable for industrial metal detection

• Suitable for conveyor and production applications

B. Working Principle

The Autonics PR18-8DP2 inductive proximity sensor works by generating an electromagnetic field from its sensing face.

When no metallic object is present near the sensor, the electromagnetic field remains in its normal condition.

When a metallic object enters the sensing area, it changes the electromagnetic field. The internal electronics detect this change and switch the output state.

Because the PR18-8DP2 uses a PNP normally closed output, its switching behavior differs from a normally open sensor.

The output signal can be used by a compatible PLC or industrial controller to determine whether a metallic target is present.

The control system can then use this signal to:

• Confirm machine position

• Detect metal components

• Count parts

• Start or stop machine operations

• Verify actuator movement

• Trigger alarms

• Control production sequences

C. Why Is the Autonics PR18-8DP2 Used?

The Autonics PR18-8DP2 is used when industrial machinery requires reliable and repeatable non-contact detection of metallic objects.

1. Metal Detection

The sensor can detect suitable metallic objects without physically touching them.

2. Machine Position Detection

It can confirm whether a metallic machine component has reached the required position.

3. Conveyor Monitoring

The sensor can detect metallic components or products moving along conveyor systems.

4. Production Counting

Its output can be used by a PLC or counter to count metal parts passing through the sensing area.

5. Limit Position Detection

It can be used as a non-contact alternative to a mechanical limit switch in suitable applications.

6. Automation Sequence Control

The sensor signal can be used as a condition for starting or stopping the next stage of an automated process.

7. Non-Contact Operation

The target does not need to physically press or touch the sensor.

8. Reduced Mechanical Wear

Because there is no physical switching mechanism contacting the target, mechanical wear is reduced compared with conventional limit switches.

9. PNP Normally Closed Requirement

The PR18-8DP2 is useful where the PLC or control system specifically requires a PNP normally closed sensor output.

10. Industrial Automation

It is suitable for automated machines, production lines and industrial control systems requiring metal presence detection.

D. Suitable Buyers

The Autonics PR18-8DP2 M18 8 mm PNP Normally Closed Inductive Proximity Sensor is suitable for:

• Industrial automation companies

• Machine manufacturers

• OEM machine builders

• PLC system integrators

• Control panel manufacturers

• Conveyor manufacturers

• Packaging machine manufacturers

• CNC machine manufacturers

• Assembly line manufacturers

• Material handling companies

• Automotive component manufacturers

• Metal processing industries

• Special purpose machine manufacturers

• Factory maintenance departments

• Production plants

• Automation engineers

• Electrical contractors

• Instrumentation companies

• Industrial maintenance teams

• Manufacturing companies

It is especially suitable for buyers searching for an M18 proximity sensor, 8 mm proximity sensor, PNP NC proximity sensor, inductive proximity sensor, metal detection sensor or Autonics proximity sensor.

FAQ

1. What is the Autonics PR18-8DP2?

The Autonics PR18-8DP2 is an M18 cylindrical inductive proximity sensor designed for non-contact detection of metallic objects.

2. What is the sensing distance of the PR18-8DP2?

The sensing distance is 8 mm.

3. What size is the PR18-8DP2?

It is an M18 cylindrical proximity sensor.

4. Is the PR18-8DP2 an inductive proximity sensor?

Yes. It uses inductive sensing technology to detect metallic objects.

5. Is the Autonics PR18-8DP2 PNP or NPN?

The PR18-8DP2 is a PNP output sensor.

6. Is the PR18-8DP2 normally open or normally closed?

This model uses a normally closed output.

7. What does PNP normally closed mean?

PNP refers to the output transistor configuration.

Normally closed means the output is in its normal active state when the target is not detected and changes state when the metallic target enters the sensing area.

The exact PLC input behavior depends on the wiring and control system configuration.

8. What type of objects can the PR18-8DP2 detect?

The sensor is designed primarily for detecting metallic objects.

9. Can the PR18-8DP2 detect plastic?

Inductive proximity sensors are intended mainly for metal detection.

For plastic, glass or other non-metallic materials, a capacitive or photoelectric sensor may be more appropriate.

10. Can it detect stainless steel?

Inductive sensors can detect stainless steel and other conductive metals, although the effective sensing distance may vary according to the target material and size.

11. Can the PR18-8DP2 be connected to a PLC?

Yes. Its PNP output can be connected to a compatible PLC digital input.

The PLC input type and wiring arrangement should be checked before installation.

12. Why would I choose a normally closed proximity sensor?

A normally closed output may be preferred in certain machine control and safety monitoring arrangements where the control system needs a defined signal during normal operation.