Manhole Detector FBG-MAN

Manhole Detector

The manhole detector is FBG based sensor dedicated for outdoor monitoring of manholes, shafts, cable entrances, and any other premises requesting permanent security using optical approach. Detector’s robust design enables to withstand harsh environment condition. The sliding rod is protected by rubber bellows to ensure IP68 standard while its robust design enables withstand temporal flooding.

The detector is delivered with ruggedized input and output optical fibers protecting the optical fiber against rough manipulation. The cable length is 90cm by default. The cables are terminated by scissor cut for fiber splicing to optical communication fiber. The detector is operated on common SMF G.652 fiber type.Additional fiber termination can be provided on request, like FC/APC connectors or E2000.

The four Ø3,2mm corner holes provide a stable mounting point on any surface. For easier installation, the mounting plates are delivered together with detectors. The special design of mounting plates or L-shaped plates can be supplied on request.


  • Robust aluminium alloy material
  • Supersensitive sliding touch, swiveling
  • Possible temperature compensation to ensure even better detection
  • Can be mounted on the bottom side or rear side to a structure.
  • Ruggedized fiber design
  • Mounting plates included
  • Additional mounting solution on request



Waterproof design IP68
Size    240mm x 50mm x 27mm
Detector weight 320g
Operational temperature range    -20 – +70°C
Linear detector range      
up to 50mm
Fiber length    
90cm output/input
Fiber termination bare fiber or connectors (FC/APC, E2000,...)

Download files

  • pdf Datasheet , size: 1.26 MB, last update: 09.08.2019

Manhole Detector

Manhole detector

Manhole detector



2019 6. 6.

Exhibition SENSOR + TEST 2019

We would like to invite you to visit our booth at the international exhibition

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