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Allen-Bradley 871L-B20E40-T2 Inductive Proximity Sensor

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Allen-Bradley 871L-B20E40-T2

by Allen-Bradley

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OverviewElevate your industrial automation processes with the Allen-Bradley 871L-B20E40-T2 Inductive Proximity Sensor. This sensor is engineered for exceptional reliability and precision in non-contact metallic object detection, making it a critical component for demanding industrial settings. Featuring a substantial 40mm sensing head and a generous 20mm detection range, the 871L-B20E40-T2 ensures accurate and efficient operation, reducing downtime and enhancing productivity. Its advanced shielded design effectively minimizes interference from nearby metallic structures, guaranteeing consistent and repeatable results. The convenient 2-wire AC/DC power configuration simplifies installation, while the versatile selectable Normally Open (N.O.) or Normally Closed (N.C.) output accommodates a wide array of operational needs. Enclosed in a robust, industrial-grade housing with a 0.5-inch NPT threaded conduit entry, this sensor is built for longevity and provides a secure, adaptable fit within your existing infrastructure. Palm Parts Solution has the Allen-Bradley 871L-B20E40-T2 in stock and available for rapid shipment to meet your urgent operational requirements.Key Features Extended 20mm Detection Range: Ensures dependable and precise sensing of metallic items, even at a moderate distance. Advanced Shielded Construction: Reduces susceptibility to false triggers and external interference from adjacent metal components, promoting stable functionality. Flexible 2-Wire AC/DC Power: Simplifies the installation process, decreases wiring complexity, and integrates smoothly into various electrical systems. Selectable N.O./N.C. Output: Provides unparalleled adaptability to fulfill specific control logic demands, increasing application flexibility. Robust 40mm Head Diameter: Optimized for detecting larger targets, offering increased versatility across numerous industrial applications. Secure 0.5-inch NPT Conduit Port: Facilitates a sturdy and protected wiring connection, essential for harsh industrial environments. Durable Industrial-Grade Casing: Constructed to endure the rigors of challenging operational settings, ensuring extended life and consistent performance. Technical Specifications Model Identifier: 871L-B20E40-T2 Sensing Method: Inductive Proximity Detection Distance: 20mm Head Diameter: 40mm Output Configuration: Selectable Normally Open (N.O.) or Normally Closed (N.C.) Power Input: 2-Wire AC/DC Conduit Connection: 0.5-inch NPT threads Housing Material: Industrial-Grade Construction Operational Temperature Range: Optimized for demanding industrial environments Applications Material Handling Systems: Accurately identifies the presence and position of metal components on conveyor belts and automated feeders. Automated Assembly Lines: Ensures precise part alignment and verification, crucial for maintaining production rates and product excellence. Machine Safety Interlocks: Monitors the status of critical machine guards and components, enhancing operational safety protocols. Advanced Industrial Automation: Integrates into complex control systems to optimize manufacturing processes and improve overall efficiency. Packaging and Sorting: Reliable detection of metallic containers and products for streamlined packaging and sorting operations. Why Choose This Model?Unwavering Reliability: Allen-Bradley's reputation for quality, combined with a shielded design, guarantees consistent and accurate detection, minimizing costly errors. Enhanced Versatility: The selectable N.O./N.C. output and AC/DC compatibility provide exceptional flexibility for integration into diverse industrial control systems. Simplified Integration: Designed for straightforward installation with 2-wire connectivity and standard NPT conduit entry, saving time and resources. Built for Endurance: Its durable construction and robust housing are specifically engineered to withstand the most challenging industrial conditions, ensuring a long operational lifespan.Order NowContact Palm Parts Solution today to secure your Allen-Bradley 871L-B20E40-T2 Inductive Proximity Sensor and enhance your industrial automation capabilities.FAQWhat is the sensing distance of the 871L-B20E40-T2?The sensor offers a generous 20mm sensing distance for reliable detection.Can this sensor be used in harsh industrial environments?Yes, its durable industrial-grade construction and robust housing are specifically designed for demanding operational conditions.Is the output configurable?Yes, it features a selectable N.O. (Normally Open) or N.C. (Normally Closed) output for versatile application.

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$750.00
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PRODUCT DETAILS

Allen-Bradley 871L-B20E40-T2

Overview

This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Model Identifier: 871L-B20E40-T2
  • Sensing Method: Inductive Proximity
  • Detection Distance: 20mm
  • Head Diameter: 40mm
  • Output Configuration: Selectable Normally Open (N.O.) or Normally Closed (N.C.)
  • Power Input: 2-Wire AC/DC
  • Conduit Connection: 0.5-inch NPT threads
  • Housing Material: Industrial-Grade Construction
  • Operational Temperature Range: Optimized for demanding industrial environments

Applications

  • Material Handling Systems: Accurately identifies the presence and position of metal components on conveyor belts and automated feeders.
  • Automated Assembly Lines: Ensures precise part alignment and verification, crucial for maintaining production rates and product excellence.
  • Machine Safety Interlocks: Monitors the status of critical machine guards and components, enhancing operational safety protocols.
  • Advanced Industrial Automation: Integrates into complex control systems to optimize manufacturing processes and improve overall efficiency.
  • Packaging and Sorting: Reliable detection of metallic containers and products for streamlined packaging and sorting operations.

Why Choose the 871L-B20E40-T2?

Unwavering Reliability: Allen-Bradley's reputation for quality, combined with a shielded design, guarantees consistent and accurate detection, minimizing costly errors. Enhanced Versatility: The selectable N.O./N.C. output and AC/DC compatibility provide exceptional flexibility for integration into diverse industrial control systems. Simplified Integration: Designed for straightforward installation with 2-wire connectivity and standard NPT conduit entry, saving time and resources. Built for Endurance: Its durable construction and robust housing are specifically engineered to withstand the most challenging industrial conditions, ensuring a long operational lifespan.

Availability & Shipping

  • In stock: 871L-B20E40-T2 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 871L-B20E40-T2 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The sensor offers a generous 20mm sensing distance for reliable detection.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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PALM Parts Solution sells used surplus products. PALM Parts Solution is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by PALM Parts Solution come with PALM Parts Solution's 1-Year Warranty and do not come with the original manufacturer's warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.

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