High-Pressure Infrared Spectroscopy Using a High-Temperature IR Cell

The high-pressure IR cell described here is designed for 20 bar pressure at 400 °C operating conditions, functioning within a fully inert environment. This configuration minimizes oxidation and unwanted side reactions, ensuring reliable and repeatable infrared spectral data. Part Number 101600.

A key feature of this high-pressure infrared spectroscopy cell is its crossflow gas admission, implemented using Swagelok unions. These fittings provide robust connections while allowing precise control of flow rates. Crossflow geometry enhances sample renewal in the IR beam path, improving spectral accuracy and temporal resolution during continuous measurements.

Turbulence inside the pressure cell is minimized by maintaining laminar, low-flow rate within the optical volume. Reduced turbulence limits pressure fluctuations, thermal gradients and optical distortions. In IR spectroscopy turbulence causes significant challenges in measuring chemical composition and physical properties of materials. Laminar flow control directly improves signal stability and overall data quality.