Digital Fiber Optic Sensors

FS-N series (FS-neo)

  • CE Marking
  • UL Listing(c/us)

1. Complete Setup in Just One Click

An entirely new concept in setup ease. Just one click calibrates the sensitivity and resets the display.

Complete Setup in Just One Click

2. Automatic Maintenance

The automatic maintenance function detects light intensity reduction due to dirt or misalignment, and returns the sensor to its original display state. This feature can cancel the effects of the ambient environment, enabling the sensor to continue to perform highly accurate detections.

Water Resistant

3. World's Highest Power Reduces Maintenance Time

"High power" = "large excess gain" that not only reduces the need for maintenance but also expands sensor head capabilities, which reduces setup time.

World's Highest Power Reduces Maintenance Time

Download Catalog FS-N Series Digital Fiber Optic Sensors Catalog (English)


Your KEYENCE direct sales engineer can bring the product to your facility for a live demonstration. KEYENCE's sales engineers are highly trained and have extensive industry experience to help you find the solution you need.

Request Demo / Test


Need more information about one of our solutions? Want a price quote? Have a support question? Contact us with your inquiry and your local product expert will reach out to you with the best answer.

Contact Us

Have a quick question or prefer to reach out by phone?

1-888-KEYENCE (1-888-539-3623)

*Callers will be directed to the nearest sales office.

Download Catalog FS-N Series Digital Fiber Optic Sensors Catalog (English)

Case Studies

  • The Problem: Each medical cartridge in the nest must contain only one bead of blood. What was happening is the cartridge would get by with no bead in it or more than one. All of these beads are forced down a tube by air.


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