Site Search:  

Gas Transmission Infrared Fiber Optic Probe for Gases

  • 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


FlexiSpec® product line includes the latest generation of Transmission infrared fiber optic probes for gases to be used with any spectrometer or photometer.
The design of Transmission Fiber Probe for gases is based on a bifurcated fiber bundle. Due to low Mid IR-attenuation in gases the collimated beam design of double pass (or multiple pass) gas cell is needed to increase optical path length to 10 – 40cm. This design is easily realized by the mean of the collimating objective and reflecting mirror cell.
  • Reaction investigation and monitoring in real time
  • Analytical Characterization
  • Exhaust gases monitoring
  • Solvent vaporization monitoring
  • Associated petroleum gas monitoring

Specification of Gas Transmission Fiber Optic Probes FlexiSpec®

Probe type Transmission in double-pass gas cell
Transmission range 0.5 - 2.2µm 1.6 – 5.5µm 3 – 18µm
Fiber type Silica Chalcogenide IR Polycrystalline IR
Temperature range -50°C +200°C -50°C +90°C -50°C +140°C
Sensitivity >1ppm depending on optical path, spectrometer performance, gases in test

Common Parameters of Gas Transmission Fiber Optic Probes FlexiSpec®

Total Length 1.5 m (opt: 1 – 30m) *
Transmission Cell Length 100mm (opt: 5 – 200mm) *
Transmission cell Diameter 25cm
Shaft Material Stainless Steel, Hastelloy C22
Protective Tube Material Liquid Tight SS-Conduit, KOPEX-Tube
Input / Output Connectors Long SMA *

Application Note