OWL Precision Coupled Visual Fault Locator, High-intensity visible laser, Continuous wave, and Pulsed mode, 2.5mm universal connector port

Reference#: 72191
Item#: OW-PCVFL-1


PCVFL (Precision Coupled Visual Fault Locator) is a light-weight, hand-held tool used to quickly troubleshoot faults in the continuity of both single-mode and multimode fibers, especially at fiber launch points or in OTDR dead zones. A high-intensity visible red laser beam is precision-coupled into a optical fiber; breaks and micro-bends in the fiber deflect the red light into the fiber jacket, producing a red glow at the point of the fault.
Additionally, the PCVFL can be used as an end-to-end visual fiber identifier, which is useful for locating fibers terminated in poorly labeled or unlabeled fiber patch panels.
A single switch is used to operate the PCVFL, toggling the unit between OFF, CW (continuous wave), and Pulsed modes.
Typical battery life in CW mode is 15 hours, and the short 12.5% duty cycle in pulsed mode extends the battery life to 120 hours of continuous use.
The PCVFL ships standard with a 2.5mm universal connector port, which allows for connection to ST, SC, and FC connectors.
Extreme caution must be exercised when operating the PCVFL.  Lasers such as the ones in the PCVFL produce intense beams of laser light that are harmful to the eye.


  • High-intensity visible laser allows for visible fault location of breaks and microbends in both single-mode and multimode fibers
  • Both Continuous Wave mode and Pulsed mode allow for easy fiber identification
  • 2.5mm universal connector port - allows connection to ST , SC, and FC  connectors
  • Simple  single-switch operation
  • CW Mode - 15  hours use on one 9v battery
  • Pulsed Mode- 120 hours use on one 9v battery
  • Low battery indicator
  • Hand-held
  • Lightweight


Visual Range up to

  • 5 kilometers (3.1 miles)

Optical Output at least

  • 1 mW red laser

Optical Transmission

  • Continuous Wave or pulsed at 6 Hz w/12.5% duty cycle


  • 4.94 x 2.75 x 1.28 in


  • 6 ounces