Axiom Analytical, Inc. Announces a Fiber-Optic Near-infrared Transmission Probe for Extremely Low Temperature Process Analytical Applications

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  • Published: Nov 10, 2014
  • Source: Axiom Analytical, Inc
  • Channels: Raman / Infrared Spectroscopy
thumbnail image: Axiom Analytical, Inc. Announces a Fiber-Optic Near-infrared Transmission Probe for Extremely Low Temperature Process Analytical Applications

Tustin, CA. November 7, 2014.

Axiom Analytical, Inc. has announced its FPT-850LT Cryogenic Near-Infrared Transmission Probe. The new probe is closely related to the Company’s standard FPT-850 probes for chemical process monitoring. However, it includes modifications and specialized processing to insure robust long-term service at extremely low temperatures. These make the FPT-850LT uniquely appropriate for such applications as Liquefied Natural Gas (LNG) processing.

In common with the Company’s existing FPT-850N Near-IR and FPT-850V Visible Transmission Probes, the low temperature probe has been developed to provide maximum long term reliability under the extreme conditions of thermal shock and aggressive chemistries encountered in many on-line process applications. The probe design has two key elements. The first is a proprietary sealing technique involving a direct sapphire to metal welded pressure seal (U.S. Patent 6,587,195 B1). This approach provides significant advantages over other sealing techniques. A high degree of chemical resistance is assured by the fact that the only materials in contact with the process are sapphire, high nickel alloys, and a thin layer of PTFE. The compliance required to withstand extreme temperatures is provided by the high nickel alloy seal which is compressed at high pressure prior to welding. This approach eliminates fatigue and stress failures common with brazed seals as well as the limited lifetime characteristic of elastomeric seals.

The second key element of the FPT-850 design is the elimination of optical fibers within the probe (U.S. Patent 5,418,615). This insures excellent optical stability and long term reliability. The elimination of both internal optical fibers and elastomeric seals provides for reliable long term operation at temperatures as high as to 400ºC. FPT-850N Near-infrared Transmission Probes are widely used for on-line process analysis in the chemical, petroleum, and pharmaceutical industries as well as in process development and related PAT (Process Analytical Technology) applications.

About Axiom Analytical, Inc

Axiom Analytical, Inc. was founded in 1988 by Dr. Mike Doyle and Norm Jennings, pioneers in the field of process FTIR spectroscopy. The Company’s mission is to develop and market the robust sampling equipment, software, and integrated systems required to fully realize the potential of vibrational spectroscopy for solving economically significant problems both in laboratory analysis and manufacturing processes. The Company’s products are employed in diverse industries ranging from basic chemicals to pharmaceuticals, semiconductors, and polymer processing. In short, the Company’s products are found wherever process analytical technology (PAT) is being applied. Its hardware products include ATR probes, transmission probes, diffuse reflectance probes, Raman probes, flow cells for gas and liquid analysis, and fiber-optic multiplexers. These cover the full range of molecular analysis including mid-IR, near-IR, UV-visible, and Raman spectroscopy. Axiom’s CEO, Dr. Mike Doyle, was recently awarded the Williams Wright award for 2014, recognizing his many contributions to the field of industrial molecular spectroscopy. More information about Axiom Analytical Inc. can be found at

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