Attenuated Total Reflection

Developments in near and mid infrared fibre optic materials have enabled Fibre Photonics to provide a family of ATR immersion probes. Reliable spectral measurements of fundamental molecular vibrations in the ‘fingerprint region’ are now a reality for liquid chemical processes in the near and the mid infrared regions in applications such as:

  • Reaction Monitoring
  • Crystallisation Development & Screening
  • Process Analytical Technology (PAT)
  • Analytical Characterisation
  • Biopharmaceutical Analysis
  • Biofuel Development & Production

Reaction Monitoring Example

Reaction Monitoring with mid-IR ATR Fibre Probe

ATR Tip

Material

Fibre Optic  

Material

Transmission

Temperature

Pressure*

(cm-1)

(mm)

(°C)

(Bar)

Diamond

Polycrystalline IR

600 – 1900

2300 – 3100

5.2 – 17

3.2 – 4.5

-150°C / +140

200

Zinc Selenide

Polycrystalline IR

600 – 3100

3.2 – 17

-150°C / +140

10

Cubic Zirconium

Chalcogenide IR

1550 – 6650

1.5 – 6.5

-150°C / +90

100

* For 12mm diameter shafts

Common ATR Probe Specifications

Probe Head (Shaft) Material

Hastelloy C22

Sheating Material

Liquid Tight SS-Conduit, KOPEX

Minimal Bending Radius (mm)

130

Probe Body/Shaft Diameter (mm)

6.3 or 12

Probe Body Length (mm)

200, 250, 300, 350, 400, 450, or 500 *

Total Length (Body plus Fibre) (m)

1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 or 5.0 *

Input/ Output connectors for legs

Long Ti-SMA (opt.: any other type)

Compatible Process-Interfaces

Ceramat-FOS or SensoGate-FOS **

* Customized dimensions are available on request

** Available for 12mm shafts only

The Fibre Photonics range of ATR immersion probes are manufactured from a range of corrosion and abrasion resistant materials. They are suitable for laboratory, pilot plant and in-process applications and are compatible with all types of spectrometers.User selectable tip and shaft materials allow each probe to be customised to meet the needs of applications, which include:

Reaction Monitoring Examples

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 For product availability and pricing contact: sales@fibrephotonics.com +44 (0) 845 557 6450