Autonics PRL08-2DN M8 2mm NPN Inductive Proximity Sensor

A. Product Overview

The Autonics PRL08-2DN M8 2mm NPN Inductive Proximity Sensor is an industrial sensor designed to detect metallic objects without physical contact.

It uses an inductive sensing principle, making it suitable for detecting iron, steel, and other conductive metal objects in automated machinery and industrial equipment.

Key Specifications

• Brand: Autonics
• Model: PRL08-2DN
• Sensor Type: Inductive Proximity Sensor
• Housing Type: Cylindrical threaded M8
• Sensing Side Diameter: 8 mm
• Installation Type: Non flush
• Sensing Distance: 2 mm
• Output Type: NPN Normally Open
• Wiring Type: DC 3 wire
• Power Supply: 12 to 24 VDC
• Operating Voltage: 10 to 30 VDC
• Current Consumption: Maximum 10 mA
• Control Output: Maximum 200 mA
• Response Frequency: 1 kHz
• Standard Sensing Target: 8 × 8 × 1 mm iron
• Hysteresis: Maximum 10 percent of sensing distance
• Indicator: Red LED operation indicator
• Protection Rating: IP67
• Operating Temperature: Approximately minus 25°C to 70°C
• Housing Material: Nickel plated brass

The PRL08-2DN also includes protection against electrical conditions such as surge, overload, short circuit, and reverse polarity, helping improve reliability in industrial environments.

B. Working Principle

The Autonics PRL08-2DN inductive proximity sensor works using electromagnetic induction.

When power is supplied to the sensor, an electromagnetic field is generated around its sensing face.

When a metallic object enters this electromagnetic field, eddy currents are generated inside the metal. These currents change the oscillation condition inside the sensor.

The electronic circuit detects this change and switches the NPN Normally Open output.

The sequence can be understood as:

Sensor powered → Electromagnetic field generated → Metal object approaches → Field changes → Sensor detects object → NPN output switches

Because the sensor does not need physical contact with the object, there is very little mechanical wear.

The 2 mm sensing distance makes the PRL08-2DN particularly suitable for applications where accurate detection is required in a compact installation space.

C. Why Is the Autonics PRL08-2DN Used?

The Autonics PRL08-2DN is used when an industrial machine needs reliable and repeatable detection of metallic objects.

Non Contact Metal Detection

The sensor detects metal without mechanically touching the target. This helps reduce wear compared with conventional mechanical switches.

Position Detection

It can determine whether a metal machine component has reached a particular position.

Examples include:

• Cylinder position detection
• Machine component positioning
• Fixture detection
• Metal plate detection
• Moving mechanism detection

Object Presence Detection

The sensor can confirm whether a metallic component is present before another machine operation begins.

PLC Input Detection

The NPN output can be connected to a compatible PLC or industrial controller input for machine automation.

Counting Applications

The 1 kHz response frequency allows the sensor to detect rapidly moving metallic targets, making it suitable for many counting and production monitoring applications.

Limit Detection

It can be used as a non contact alternative in applications traditionally handled by mechanical limit switches.

Machine Safety and Interlocking

The sensor can provide a position or presence signal to a control system before another operation is allowed to proceed.

D. Suitable Buyers

The Autonics PRL08-2DN M8 inductive proximity sensor is suitable for a wide range of industrial buyers and automation users.

Machine Manufacturers

OEM machine builders can use the PRL08-2DN for position sensing, object detection, counting, and automated machine sequences.

Industrial Automation Companies

System integrators can connect the sensor with PLCs, control panels, relays, counters, and automation controllers.

Control Panel Manufacturers

Panel builders requiring NPN sensor inputs for PLC based control systems can use this model.

Packaging Machinery Manufacturers

It can be used for detecting metallic machine components, mechanisms, products, or positioning elements in packaging equipment.

Conveyor System Manufacturers

The sensor can provide metal object detection and positioning signals in automated conveyor systems.

Automotive Component Manufacturers

It can be used in automated assembly, component detection, machine positioning, and production line applications.

CNC and Machine Tool Manufacturers

The compact M8 construction is useful where installation space is limited and precise metal detection is required.

Factory Maintenance Departments

Maintenance engineers can use the PRL08-2DN as a replacement sensor for compatible industrial machinery.

Special Purpose Machine Manufacturers

SPM manufacturers can integrate the sensor into automated machines requiring reliable metal presence or position detection.

Robotics and Material Handling Companies

The sensor can provide feedback regarding the presence or position of metallic machine components.

FAQ

1. What is the Autonics PRL08-2DN?

The Autonics PRL08-2DN is an M8 cylindrical inductive proximity sensor designed for non contact detection of metallic objects in industrial automation applications.

2. What is the sensing distance of PRL08-2DN?

The PRL08-2DN has a nominal sensing distance of 2 mm.

3. Is the Autonics PRL08-2DN an NPN or PNP sensor?

The PRL08-2DN uses an NPN output.

4. Is the output Normally Open or Normally Closed?

The PRL08-2DN provides an NPN Normally Open output.

5. Is PRL08-2DN a 2 wire or 3 wire sensor?

It is a DC 3 wire inductive proximity sensor.

6. What power supply is required for PRL08-2DN?

The sensor is designed for a nominal 12 to 24 VDC power supply, with an operating voltage range of approximately 10 to 30 VDC.

7. What is the size of the PRL08-2DN?

It uses a compact M8 cylindrical threaded housing with an approximately 8 mm sensing side diameter.

8. What type of material can PRL08-2DN detect?

The sensor is designed for detecting metallic objects. Its specified standard sensing target is an 8 × 8 × 1 mm iron target.

9. Can PRL08-2DN detect plastic?

No. It is an inductive proximity sensor intended primarily for metallic target detection. Plastic, glass, wood, and similar non metallic materials are not suitable targets for normal inductive sensing.

10. Can PRL08-2DN detect stainless steel?

Yes, an inductive proximity sensor can detect conductive metallic materials including stainless steel. However, the effective sensing distance can vary depending on the material being detected.