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Improved optical gas analysis

Especially interesting for
  • the chemical and pharmaceutical industry
  • process control engineering

A coupling between an optical fibre and a detector, which was developed at PTB, enhances the measurement accuracy of gas analyzers by minimizing the influences of parasitic gas volumes along the measurement section. Hereby, the surface-treated glass fibre end which is normally open is embedded into gas-tight epoxy resin having the same refractive configurationsindex. In this region, the signal can, thus, no longer be influenced by ambient air. In addition, the light is defocused in the epoxy resin, so that the anti-reflex-coated detector is not saturated locally.

Advantages
  • fibre/detector coupling “without air gap”
  • reduces the influences of the ambient gas
  • minimizes interference effects
  • insensitive to vibrations