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Allen Bradley Bulletin 871T 871T-L8B18

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871T-L8B18

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The 871T-L8B18 model from Allen Bradley is an inductive proximity switch designed for precise non-contact metal detection applications. Featuring a tubular stainless steel barrel, it is built for durability while maintaining a compact design.

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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 871T-L8B18

ManufacturerAllen Bradley
Product TypeInductive proximity switch
Product LineBulletin 871T
Part Number871T-L8B18
UPC662073428831
Weight0.38 lbs (0.17 kg)
Sensing PrincipleNon-contact metal detection
Barrel Style & DiameterTubular, 18 mm diameter
Housing MaterialStainless steel barrel
Sensing Face MaterialPlastic face
Maximum Sensing Range8 mm
Operating Voltage Range10-30 VDC, 3-wire
Output ConfigurationNormally open, PNP
Maximum Load Current400 mA
Switching Frequency500 Hz
Electrical ConnectionPVC cable, 3 m
Enclosure Protection RatingIP67, NEMA 4/12/13
ShieldingUnshielded (non-flush)
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The Allen Bradley 871T-L8B18 is a compact inductive proximity switch designed for reliable metal detection without direct contact. This module features a sleek tubular design with an 18 mm diameter encompassed by a stainless steel barrel, providing both robust protection and longevity. The sensing face consists of a durable plastic material, which contributes to its resilience in industrial applications.

This switch operates effectively at an electrical voltage range of 10 to 30 VDC and has a functioning distance of up to 8 mm. Its normally open output configuration type is PNP, allowing for efficient integration into existing control systems. Capable of delivering a maximum load current of 400 mA and a switching frequency of 500 Hz, the 871T-L8B18 stands out for its responsiveness and effectiveness in various scenarios.

The connection to the device is made through a PVC cable that is 3 meters long, allowing flexibility in installation. Moreover, with an enclosure protection rating of IP67 and NEMA classifications of 4, 12, and 13, this proximity switch is designed to resist dust and water ingress, enabling it to function reliably in harsh environments. The unshielded (non-flush) design further enhances its performance in applications requiring accurate metal detection without interference.