• SICK WL8G-P2231 Photoelectric Switch Sensor - Reliable Motion Detection - SICK [1]
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SICK WL8G-P2231 Photoelectric Switch Sensor - Reliable Motion Detection

SICK WL8G-P2231 Photoelectric Switch Sensor - Reliable Motion Detection

$114.38 USD
$114.38 USD $114.38 USD
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MPN wl8g-p2231
Model WL8G-P2231
Output analog signal
Mounting type vandal-resistant
Mounting method screws
Mounting location ceiling, floor, walls
Type Photoelectric Switch Sensor
Brand SICK
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Description


SICK WL8G-P2231 Photoelectric Switch Sensor - Reliable Motion Detection

SICK WL8G-P2231 offers reliable motion detection for efficient security solutions.

The SICK WL8G-P2231 Photoelectric Switch Sensor is a reliable and efficient motion detection solution. It uses advanced photoelectric technology to detect movement and sends an analog signal to trigger alarms or alarms systems. The vandal-resistant design and screws mounting method make it suitable for various environments such as ceilings, floors, and walls.

Engineer's Quick Brief

The SICK WL8G-P2231 is a compact retro-reflective photoelectric sensor designed for reliable detection of transparent and reflective objects in industrial automation systems.

  • Transparent object detection: Optimized autocollimation optics reduce blind spots and improve stability when detecting glass, film, or clear packaging.
  • Fast industrial response: Up to 1 kHz switching frequency with ≤0.5 ms response time for conveyor and packaging applications.
  • Compact machine integration: Miniature 11 × 31 × 20 mm housing with IP67 protection for tight installation spaces.

Typical applications include packaging machinery, conveyor automation, transparent bottle detection, pharmaceutical transport systems, and high-speed industrial material handling.

SEO Introduction

The SICK WL8G-P2231 miniature photoelectric sensor belongs to the SICK W8G series of industrial retro-reflective sensors. It features PNP switching output, 10–30 V DC supply voltage, IP67 enclosure protection, and integrated light/dark switching selection.

Designed for motion detection, transparent object sensing, conveyor automation, and industrial machine safety monitoring, the WL8G-P2231 is widely used in packaging systems, bottling equipment, semiconductor handling lines, and automated assembly systems.

The sensor uses autocollimation optics and a polarization filter to achieve stable object recognition while minimizing false triggering caused by reflective surfaces.

Technical Specifications

Parameter Specification
Manufacturer SICK
Model WL8G-P2231
Part Number 6033188
Sensor Type Photoelectric Retro-Reflective Sensor
Detection Principle Autocollimation / Coaxial Optics
Detection Range 0 – 3 m
Light Source Visible Red LED
Wavelength 650 nm
Output Type PNP
Switching Mode Selectable Light-ON / Dark-ON
Output Current ≤ 100 mA
Supply Voltage 10 – 30 V DC
Current Consumption 30 mA
Response Time ≤ 0.5 ms
Switching Frequency 1,000 Hz
Connection Type M8 Male Connector, 4-Pin
Housing Material ABS Plastic
Optics Material PMMA Plastic
Dimensions 11 × 31 × 20 mm
Protection Rating IP67
Operating Temperature -25°C to +55°C
Storage Temperature -40°C to +70°C
Special Feature Transparent Object Detection
Protection Functions Reverse Polarity, Overcurrent, Short-Circuit Protection
Included Accessories BEF-W100-A Mounting Bracket, P250F Reflector

Technical data verified from SICK and industrial distributor datasheets. :contentReference[oaicite:0]{index=0}

Application Matrix

Industry Typical Use Engineering Value
Packaging Automation Transparent film and bottle detection Reduces missed detection on reflective packaging surfaces
Conveyor Systems Object presence verification Fast switching response for high-speed transport lines
Pharmaceutical Equipment Blister pack monitoring Reliable small-object sensing with compact installation
Food & Beverage Bottle counting and cap inspection Stable operation in humid industrial environments
Electronics Manufacturing Tray positioning and component transfer Compact housing suitable for dense machine layouts

Koeed B2B Tool — Wiring & Detection Logic Simulator

Output state will appear here.
Typical M8 4-Pin Wiring:

Pin 1 (Brown) → +24 VDC
Pin 3 (Blue) → 0 VDC
Pin 4 (Black) → PNP Output
Pin 2 (White) → Optional Function / Not Used Depending on System

Troubleshooting & FAQ

Why does the WL8G-P2231 fail to detect transparent objects consistently?

Verify reflector alignment and sensor sensitivity adjustment. Transparent materials such as glass or film may require precise optical alignment and clean reflector surfaces.

How do I switch between Light-ON and Dark-ON operation?

The WL8G-P2231 includes a rotary selector that allows direct switching between Light-ON and Dark-ON operating modes.

What is the recommended supply voltage?

The sensor operates from 10 VDC to 30 VDC, with 24 VDC commonly used in industrial PLC systems.

Why is the sensor output unstable on conveyors?

Common causes include reflector vibration, excessive dust contamination, incorrect mounting angle, or electrical noise from nearby motor drives.

Can the sensor be connected directly to a PLC input?

Yes. The PNP switching output is compatible with standard PLC digital input modules configured for sourcing outputs.

What maintenance is recommended?

Regularly clean the optical surface and reflector using non-abrasive materials. Check cable strain relief and mounting stability during preventive maintenance inspections.

Cross-Reference Guide

Reference Model Relationship Notes
WL8G-P2231S01 Series Variant Special configuration within W8G sensor family
WTB8-P2131 Alternative Detection Principle Diffuse photoelectric sensor for short-range object sensing
WL100L-F2231 Extended Detection Range Larger sensor body with longer sensing distance
6033188 Ordering Number Manufacturer-specific catalog reference for WL8G-P2231

Cross-reference information based on SICK W8G series documentation and distributor listings. :contentReference[oaicite:1]{index=1}

About Koeed Automation

Expert Supply Solutions for Global Industrial Electronics

At Koeed.com, we are professional architects of the industrial electronics supply chain. We specialize in providing high-performance PLCs, HMIs, Servo Motors, Drives, and Converters to ensure that modern manufacturing operations remain efficient, reliable, and future-proof in 2026’s competitive landscape.

🛡️ Certified Quality

We source only 100% authentic industrial hardware from global category leaders. Every component undergoes a rigorous verification process to meet Industry 4.0 reliability standards.

⚙️ Engineering Domain

Our experts provide more than just parts; we offer technical insight. We assist in complex product selection and compatibility audits for both legacy system upgrades and new installations.

🌐 Rapid Global Logistics

Time is money in industrial automation. Our optimized supply network ensures that critical components reach your facility quickly, significantly reducing unplanned downtime and operational loss.

Strategic Global Portfolio: Siemens, Omron, FANUC, Schneider Electric, Mitsubishi, Yaskawa, Allen-Bradley, and other elite industrial brands.

Supporting your vision for a smarter, more efficient industrial future.

Alternative Names


  • SICK WL8G-P2231
  • SICK Photoelectric Switch
  • SICK Motion Sensor

Special Reminder

Important

If you have any questions about product information and prices, please feel free to contact us by email or WhatsApp. We will respond quickly.

  • Business Days Only (Monday through Saturday)
  • It takes up to 10 days from the time of ordering (excluding Saturdays and Sundays) to the time of delivery to your designated location. Worldwide delivery.
  • Within 3 days after placing the order, we will send you photos and videos of the product via email or WhatsApp for confirmation

International shipping - items may be subject to customs processing depending on the item's customs value.
Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:

  • Delays from customs inspection.
  • Import duties and taxes which buyers must pay.
  • Brokerage fees payable at the point of delivery.

Shipping Policy

Global Delivery

We ship to customers all over the world. Our primary logistics providers are DHL, UPS, TNT, FedEx, and EMS.

Processing Time

All orders are processed within 72 hours of purchase. Please note that this applies to business days only.

Shipping Rates & Delivery Estimates

Shipping charges for your order will be calculated and displayed at checkout. Delivery estimates are within 7-14 days. Please note that these shipping times are only estimates and unfortunately, cannot be guaranteed.

Shipment Confirmation & Order Tracking

You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.

Customs, Duties, and Taxes

Please note, international shipping services do vary from country to country. To find out the exact services that are available, please put in your full address at checkout. Shipping internationally does mean that you may be required to pay customs and import taxes. All international customers are responsible for the customs rates within their own country. For further information, we recommend contacting your local customs office.

Damages

We take every reasonable precaution to ensure that products are not damaged. If the item is damaged in transit, please immediately contact us. We are not liable for any products damaged or lost during shipping. If you received your order damaged, please contact the shipment carrier to file a claim. Please save all packaging materials and damaged goods before filing a claim.

Force Majeure

When encountering with force majeure, the processing of orders will be delayed. Nevertheless, it is ensured that your order will be processed in a fast manner when weather permits.

Address Verification

Please verify you have the correct shipping address on your order PRIOR to making payment as this is the address we will ship to.

Return Policy

For more information, visit our Return Policy page.

International shipping - items may be subject to customs processing depending on the item's customs value.

Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:
• Delays from customs inspection.
• Import duties and taxes which buyers must pay.
• Brokerage fees payable at the point of delivery.

Contact Us

If you have any questions about your order, please contact us at moritta@koeed.com.

Return Policy

Return and Refund Policy

We want you to be completely satisfied with your purchase on our store. If for any reason you are not entirely satisfied, we're here to help!

Returns

You have a generous 30 calendar days to return an item from the date you received it. To be eligible for a return, ensure the item is in its original, unworn, and unused condition with tags and packaging intact. Retain your receipt or proof of purchase for eligibility. Please note that certain items are non-returnable like perishables, custom products, personal care goods, hazardous materials, flammable liquids, and gases. Reach out for clarifications on specific items.

Return Process

Commence the return process by reaching out to us at moritta@koeed.com. Upon approval, we will furnish you with a return shipping label and detailed instructions for dispatching your package. Unnotified returns will not be accepted.

Damages and Issues

Kindly review your order upon delivery. Notify us promptly if it arrives defective, damaged, or incorrect. We will address the matter swiftly.

Exchanges

Facilitate a swift exchange by returning the original item once approved and making a new purchase.

EU 14-Day Cooling Off Period

EU-bound shipments allow a 14-day cancellation or return period without justification. Conditions mirror standard returns.

Refunds

Upon receiving and inspecting your return, we’ll inform you of the refund status. Approved refunds are automatically processed within 10 business days via the initial payment method. Allow time for financial institutions to finalize the refund. For delays exceeding 15 business days post-approval, contact us at moritta@koeed.com.

Shipping

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Contact Us

If you have any questions on how to return your item to us, feel free to contact us at moritta@koeed.com.

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