I-MON 256 USB / 512 USB

I-MON USB Interrogation Monitor


The I-MON 256/512 USB interrogation monitors offer real-time spectrum monitoring of FBG sensors. The USB series is based on the I-MON 256/512 OEM series. Adding our USB interface makes it possible to acquire spectra with up to 6 kHz, while maintaining sub-picometer wavelength fit resolution.

Data acquisition software provides easy setup with a laptop, and the I–MON can act as a stand-alone monitor in combination with a customer-selected light source.


Stand-alone Interrogation Monitor and/or OEM Interrogation Monitor Modules:

  • Temperature measurements
  • Pressure monitoring
  • Strain measurements
  • Vibration analysis


Parameter Unit I-MON 256 USBI-MON 512 USB
Maximum number of FBG sensors> 37 > 70
Minimum FBG spacingpm12001000 / 1200
Wavelength rangenm 1525 - 15701275-1345/1510-1595
Wavelength fit resolution (*) pm < 0.5< 0.5
Repeatability (over any pol. state) pm 3 (5 max)3 (5 max)
Wavelength accuracypm 5 (typ)5 (typ)
Wavelength drift (*)pm / deg C 1 (3 max)1 (3 max)
Dynamic rangedB3030
Input optical power rangedBm -80 to -20-80 to -20
Measurement frequencyHz60003000
InterfaceUSB 2.0USB 2.0
Current consumption (**)mA 250250
Size (LxWxD)mm110x94x49110x94x49
Operating temperaturedeg C 0 to 50 0 to 50
Storage temperature deg C -20 to 70-20 to 70

(*) Note that by applying temperature control or temperature correction the wavelength accuracy over the entire wavelength range can be improved.

(**) USB bus power

I-MON 256/512 USB Evaluation software

I-MON USB Evaluation Software

I-MON USB Evaluation Software

The I-MON USB comes with evaluation software providing plug-and-play operation. LabVIEW source code is included with the evaluation software along with DLL and drivers for OEM integration.

The I-MON Evaluation software will demonstrate the performance of the I-MON USB in an easy manner without the need for tedious programming from the customer’s side.

An example from the Evaluation software is illustrated here. The spectrum graph screen of the Evaluation software illustrates the pixel response from the image sensor of the I-MON, i.e., the FBG sensor peaks. Other screens are available for configuration, wavelength fit and FFT analysis. The software allows the user to save raw data as well as wavelength fit data for further processing with external software programs.

Ordering I-MON 256 USB

The I-MON 256 USB is available for online purchase, by either Credit Card or wire transfer:

Go to shop

Or, request a quotation here.


Ordering I-MON 512 USB

The I-MON 256 USB is available for online purchase, by either Credit Card or wire transfer:

Go to shop

Or, request a quotation here.

Download Product Sheets

pdf_icon Ibsen Product Sheet – I-MON USB

Additional Material

A detailed Product Specification and User’s Manual are available upon request by clicking here.