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  • 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®

Probe TypeDiamond ATRSilicon ATRCubic Zirconium ATR
Transmission5.2-17µm (600-1900cm -1) +
3.2-4.5µm (2300-3100cm-1)
5.2-17µm (600-3100cm -1) +
3.2-4.5µm (2300-3100cm-1)
Fiber TypePIR-900/1000
Silver Halide
Silver Halide
CIR 500/550
Chalcogenide glass (As-S)
Temperature range-100°C / + 250°C-100°C / + 250°C-100°C /+ 200°C
Pressure (max) 200Bar100Bar100Bar
Common Parameters of HT-ATR-Probes for High Temperatures FlexiSpec®
Total Length1.5m (opt.: 1m to 5m)*
Shaft Length300 mm (opt.: 300-700 mm)*
Shaft Diameter12mm
Shaft MaterialHastelloy C22
Length of Legs500mm (opt.: 200mm to 500mm)
Protective Tube MaterialLiquid Tight SS-Conduit, KOPEX-Tube
Minimal Bending Radius130mm
Input / Output ConnectorsLong SMA (opt.: any other type)
Cooling Air Flow ParametersExcess pressure 0.5Bar, Flow 2300l/h
Inner temperature controlInside shaft to control ATR tip temperature

Application Notes: Fiber Optic ATR-Probes for Harsh Environments
Summary Table for Fiber Optic ATR-Probes
Instruction Manual for Fiber Optic ATR-Probes

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