Transmission Infrared Fiber Optic Probe for Gases

Transmission infrared fiber optic probes for gases are designed to be used with any spectrometer or photometer.
The design of transmission infrared fiber optic probes is based on a bifurcated fiber bundle. In order to increase the optical path length to 10 – 40cm, the collimated beam design of double pass (or multiple passes) gas cell is needed due to low Mid IR-attenuation in gases. This design is easily realized by the mean of the collimating objective and reflecting mirror cell.

  • On-line transmission spectroscopy in gases
  • High throughput in any part of NIR-MIR spectra
  • Flexible and robust for industrial applications
  • Compatible with any spectrometer
  • Reaction investigation and monitoring in real time
  • Analytical Characterization
  • Exhaust gases monitoring
  • Solvent vaporization monitoring
  • Associated petroleum gas monitoring
Probe typeTransmission in double-pass gas cellTransmission in double-pass gas cellTransmission in double-pass gas cell
Transmission range0,5 – 2,2 µm1,6 – 5,5 μm3 – 18µm
Fiber typeSilicaChalcogenide IRPolycrystalline IR
Temperature range-50°C +200°C-50°C +90°C-50°C +140°C


Sensitivity: >1 ppm depending on the optical path, spectrometer performance, gases in test

Total Length1,5 m (opt: 1 – 30m) *
Transmission Cell Length100 mm (opt: 5 – 200 mm) *
Transmission cell Diameter25 mm
Shaft MaterialStainless Steel, Hastelloy C22
Protective Tube MaterialLiquid Tight SS-Conduit, KOPEX-Tube
Input / Output ConnectorsLong SMA *

* Customised dimensions are available on request.