For dynamic processes up to 8kHz
Interrogation monitor (FBG) 

FBG interrogation monitor for the diagnosis and monitoring dynamic processes with a sampling rate of 8 kHz up (IP40)


The FBG interrogation unit FIU – 44 – 1.55 up to 8 kHz provides registration of optical signals from unified sensor heads based on Fiber Bragg Gratings (FBGs) with a sampling frequency up to 8 kHz per second for each channel.

The module is equipped with a function of self-control and regulation on the reference signal data, and allows for expansion in Fourier series, calculate the velocity and acceleration in real time.
 Built-in full-featured software allows you to visualize the processed data to the module.

Measurable physical quantities:

By using various sensor head types, an FIU-based flexible multipurpose telemetry system can be constructed. Multipoint, quasi-distributed, or point simultaneous measurements can be implemented with such a system, the measurable physical quantities being as follows:


Technical characteristics




Polarization state of the light source partially polarized depolarized
Spectral width of an optical channel, nm 1525 ÷ 1570
The number of optical channels (one channel is reference) 4 / 8 / 16 
The number of sensors per channel** 8
Range of intensities of the registered optical signals, dBm -80 ÷ -20
Dynamic range, dB 15
Total optical power light source, dBm*** 0
Sampling frequency, kHz  < 8
Processing time and outputting data of one channel, sec 1
Software The FBG interrogator is equipped with a built-in fully functional software URM_Control
Output interfaces  USB 2.0, USB 3.0, Ethernet RJ45, SVGA, DVI-I, HDMI
Power consumption, W  < 250 
Protection class IEC 60529 IP40
Working temperature range, ºС +10 ÷ +40
Humidity, % (no condensation)  < 80
Power supply, V/Hz  220/50

* – the S-series of the FBG interrogation units have the partial polarization of the output radiation. As result it has greater measurement error when using fiber optic sensors.

** – sensor which consists of a single Bragg grating (FBG).

*** – on the request, up to 10dBm.


Advantages of the fiber-optic sensors:

  • high sensitivity and speed;
  • high immunity to noises and electromagnetic interferences, such as microwave and magnetic fields, spark discharge, and electromagnetic pulses of any nature and any intensity;
  • full electrical safety, which is due to the absence of electric circuits between the sensor and the registration module;
  • full explosion and fire safety, high chemical resistance of the sensing elements;


Areas of application:

  • energy production, including nuclear and thermonuclear installations;
  • aviation and cosmonautics;
  • land, water and underwater transport;
  • metallurgy and chemical industry;
  • oil and gas production;
  • pipeline transport;
  • construction;
  • medicine;
  • security systems;
  • scientific research.

 FBG interrogation monitor for the diagnosis and monitoring dynamic processes with a sampling rate of 8 kHz up (IP40)