FiSpec FBG Interrogators

FiSens X100 Interrogator

FiSpec Interrogators

Interrogators for FiSens® Sensor Chains

Depending on measurement requirements, a FiSens® sensor chain is interfaced with either a FiSpec® FBGX100 or FBGX150 interrogator. With their small form factor, these units integrate all the necessary components for analysis of the FiSens® sensor chains, up to 30 points per chain, for purposes of either temperature or strain measurement. For ease of interface, these interrogators both communicate and power via single USB 2.0 interface.


The following is a summary specifications and comparison of the FiSpec® interrogators. Consult the individual data sheets and manual for detailed performance and interface information.

Model X100 X150
Performance Category Standard High Precision
Number of Channels 1 1
Sensor Points per Channel 30 25
Sampling Rate 1-100 Hz 1-200 Hz
Wavelength Range 800-880nm 800-865nm
Thermal Stability ±5pm/K ±5pm/K
For Temperature Sensing
(per point):
Measurement Precision
Measurement Resolution
For Strain Sensing
(per point):
Measurement Precision
Measurement Resolution
Optical Interface FC-APC Connector, SM800 single-mode fiber FC-APC Connector, SM800 single-mode fiber
Digital Interface/Power Consumption USB 2.0 Full Speed / 5V @ 1W USB 2.0 Full Speed / 5V @ 1.5W
Dimensions/Weight 65mm x 48.5mm x 15.3mm, 60g 100mm x 68mm x 15mm, 120g
0°C to 60°C
0°C to 80°C
0°C to 60°C
0°C to 80°C
Ingress Protection IPXX IPXX

Specifications subject to change without notice
FiSens® is a registered trademark of FiSens GmbH
LabVIEW® is a registered trademark of National Instruments Corporation


  • Innovative FBG system for temperature and strain measurement
  • Lowest cost per point of any Multipoint or Distributed FBG system
  • Two models offer lowest cost/standard performance versus high resolution/highest speed interrogation
  • Temperature measurement precision to 0.1°C
  • Strain measurement precision to 1µε
  • Optical radiation is Inherently Safe for EX applications
  • Interference-free transmission up to 30 meters


  • USB Interface
  • Contact Sales for special interface requirements

Software Support

  • BraggSens software is LabVIEW®-based
  • ASCII protocol available for customer software integration
  • Contact Sales for application-specific engineering support


FBGX100 Datasheet
FBGX150 Datasheet
FBGX100 Drawing
FBGX150 Drawing
FiSens Manual
FiSens Quick Start Guide
LabView Sample Scripts


Call +1-805-389-6600 or email

Ordering Information

FBGX100 Standard Performance Interrogator
FBGX150 High Precision Interrogator

To specify and order an FBG Sensor Chain, go to FBG Sensor Chain product page

Quick Ship Configurations

FBGX100 Standard Interrogator, max 30 FBGs
FBGX150 High Precision Interrogator, max 25 FBGs, select Narrow Spectral Band option for FBG sensor chain configuration
Sensor Type Options:
T=Temperature, S=Strain
FBG Quantity 1 = 1 FBG, up to maximum 30 = 30 FBGs
Spectral Range N = Narrow (808-865nm), W = Wide (808-880nm)
For use with FBGX100 interrogator, select either N or W
For use with FBGX150 interrogator, select N only
Lead-In Protection/Jacketing Type For Standard applications, GL = Glass Textile (max 155°C)
For High Temperature Applications, SST = Stainless Steel Corrugated Tubing (max 600°C)
Sensor Capillary FI = Bare polyimided-coated fiber
PE = PEEK Tubing (max 260°C)
SSC = Stainless Steel Capillary (max 600°C)
SI = Silica capillary (max 350°C)
Xin Length of Lead-in in mm, Options 100-10’000 mm
X1..X30 Specify distance from previous FBGn-1 to next FBGn, in mm
X1 = Distance from end of Lead-In to FBG1
X2 = Distance from FBG1 to FBG2
X3 = Distance from FBG2 to FBG3
Xout Length of Lead-out termination in mm, 2-10mm

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