Slim Fiber Optic Sensors

Bulletin 42FA Slim Fiber Optic Sensors fit almost anywhere thanks to slim design and flexible mounting options. They have a fast 500-microsecond response time and a generous sensing range comparable to that of larger fiber optic sensors.

Popular Resources/Quicklinks
Presence Sensing Brochure PHOTOSWITCH Bulletin 42FA Slim Fiber Optic Installation Instructions


  • 12...24V DC operating voltage
  • PNP and NPN versions
  • Reverse polarity, false pulse and transient noise protection
  • NEMA 13 and IP65
  • Fast 500-microsecond response time

Product Selection


  • CE Marked for all applicable directives
  • CSA Certified
  • UL Listed
Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


Resource Publication Number Language
Presence Sensing Brochure SENSOR-BR001
PHOTOSWITCH Bulletin 42FA Slim Fiber Optic Installation Instructions 42FA-IN001
Literature LibraryLiterature Library
Literature Library

Browse Literature Library where you can search for additional technical and commercial publications in more languages.


Search Literature Library

KnowledgebaseKnowledgebase Support Center

Visit our online resource for technical information, support chat and forums, software updates and product safety advisories/notices.


Get Support