Fiber Optic Diffuse Reflection Probes


The diffuse reflection probes for Vis-NIR spectral range are used for process monitoring in a number of applications for liquids and powders. The unique optical design provides an effective collecting of the reflected signal and a low level of stray light.

Robust probes with sapphire window withstand perfectly to harsh process conditions. Custom options like optical window cleaning as well as high temperature design are available.

Main Features:

  • Sapphire window
  • Minimum of stray light
  • Custom option - purging of optical window
  • Custom option - hight temperature design
  • Custom option - side reflection design


  • Reaction Monitoring in real time
  • Process Analytical Technologies (PAT)
  • Crystallization Development & Screening
  • Analytical Characterization
  • Biopharmaceutical Analysis
  • Biofuel Development & Production


Probe Type Reflection
Window Sapphire
Sealing Material PTFE
Probe Shaft OD = 12 mm, L = 200 mm
Shaft Material Hastelloy C22
Total Length 2 ± 0.05 m
Flexible Fiber 1.3 m, legs of 0.5 m length each
Fiber Type NIR 400/440
Bundle Arrangement 19 around 1
Terminations 2 x SMA905
Protection Tubing Metal, PVC coated
Temperature 0 - +200 °C
Pressure 0 - 50 Bar


Available SKUs:

Product Code Article-No. Spectral Range
DR-NIR-S-12-20-200/50 AP12353 400 - 2200 nm
Side Line Reflection Probe 12-20-200/50 AP11049 400 - 2200 nm
Side Reflection Probe 12-20-200/50 AP10017 400 - 2200 nm

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