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Bulletin 871D Hydraulic Cylinder Position Inductive Proximity Sensors

Hydraulic Cylinder Position Sensors

Bulletin 871D Cylinder Position Sensors are ideal for end-of-stroke detection on hydraulic and pneumatic cylinders. Each sensor mounts into the standard in-port cylinder position sensor bolt pattern. Special spacers are available to alter the probe length for specific applications.

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  • Stainless steel probe with ceramic face
  • Withstands pressures up to 3000 psi
  • Six industry standard probe lengths from 26...115.9 mm (1.025...4.560 in.)
  • Low profile housing can be rotated 304° without breaking pressure seal
  • Shielded construction
  • Weld field immune
  • 3-wire DC and 2-wire AC/DC versions with either mini- or micro-style connectors
  • Short circuit, overload, transient noise, false pulse and reverse polarity protection


  • 871D Hydraulic Cylinder Position Sensors


  • UL Listed, cUL Certified and CE Marked for all applicable directives

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

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Typical applications for the Bulletin 871D Cylinder Position Sensors include:

  • Material handling
  • Packaging
  • Food processing
  • Transportation
  • End-of-stroke sensing of pneumatic and hydraulic cylinders

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  • Sensors Case Studies — View our case studies site to discover how customers have applied Allen-Bradley sensors products in their applications.