www.artphotonics.com > Products > Spectroscopy Fiber Probes > Fiber Optic ATR-Probes for Harsh Environment

    Fiber Optic ATR-Probes for Harsh Environment

    • High throughput in selected parts of Near & Mid InfraRed-spectra
    • ATR-tip shaped for immersion in liquid flow without dead zone
    • Robust for industrial applications in harsh environment up to 250°C
    • Resistant to high pressure
    • Compatible with all spectrometers and automated process-interfaces

    FlexiSpec® probes from art photonics include new type of Attenuated Total Reflection (ATR-) probes designed for harsh application conditions.

    HT-ATR immersion IR-fiber probes can be used for process-spectroscopy in Near & Mid IR range to monitor reactions in-line in a broad temperature range from -100° to +250°C. They can resist to high pressures up to 200Bar and used with FTIR or any other IR-spectrometers and spectral sensors in automated process control with process-interfaces.


    •  Remote Reaction Monitoring in-line in temperature range -100/+250°C
    • PAT applications in lab, pilot plant or industry with process-interfaces for automated process control
    • Polymerization Process Control
    • In-situ IR-Spectroscopy for PAT in Chemical, Petrochemical, Atomic, Biopharmaceutical & Food Industry

    Specification of IR-Fiber HT-ATR-Probes for High Temperatures FlexiSpec®


    Diamond ATR

    Silicon ATR

    Cubic Zirconium ATR   


    5.2-17μm (600-1900cm -1) +
    3.2-4.5μm (2300-3100cm-1)

    5.2-17μm (600-3100cm -1)


    Fiber type


    Silver Halide


    Silver Halide

    CIR 500/550 


    glass (As-S)


    Temperature range

    -100°C / + 250°C

    -100°C / + 250°C

    -100°C /+ 200°C                         

    Pressure (max)




    Common Parameters of HT-ATR-Probes for High Temperatures FlexiSpec®

    Total Length

    1.5m (opt.: 1m to 5m)*

    Shaft Length

    300 mm (opt.: 300-700 mm)*

    Shaft Diameter


    Shaft Material

    Hastelloy C22

    Length of Legs

    500mm (opt.: 200mm to 500mm)

    Protective Tube Material

    Liquid Tight SS-Conduit, KOPEX-Tube

    Minimal Bending Radius


    Input / Output Connectors

    Long SMA (opt.: any other type)

    Cooling Air Flow Parameters

    Excess pressure 0.5Bar, Flow 2300l/h

    Inner temperature control

    Inside shaft to control ATR tip temperature