With the introduction of medical gas standard USP37 in the US, requiring a specific, selective and positive identification test using a paramagnetic signal, the focus is on the right analyser to ensure oxygen concentration is NLT 99.0% volume.

Following the appropriate US Pharmacopeia standards, in this case specifically USP37, this requires an analyser which uses a paramagnetic-based technology.

The paramagnetic PM700 oxygen analyser from Systech Illinois is ideally suited for this medical gas analysis application.

The technology required for this standard has a paramagnetic sensor which utilises the paramagnetic susceptibility of oxygen, a physical property which distinguishes oxygen from most other gases. The sensor incorporates two nitrogen-filled glass spheres mounted on a rotating suspension. This assembly is suspended in a strong magnetic field. The oxygen in the surrounding gas is attracted to the magnetic field, resulting in a force on the glass spheres. The strength of the torque acting on the suspension is proportional to the oxygen content of the surrounding gases.

Utilising a well-proven magneto-dynamic (dumb bell) transducer, the PM700 offers high performance oxygen analysis. It incorporates user-friendly software to provide accurate and reliable results with a non-depleting sensor providing years of trouble-free operation.

Systech Illinois’ PM700 Paramagnetic analyser can be used for the following applications:

  • European Pharmacopeia 2.5.27 Oxygen in Gases
  • EP monograph of Argon – IDENTIFICATION A. “Verify that the gas is not oxygen using a paramagnetic analyzer (2.5.27).”
  • USP 37 Medical Air (19.5% to 23.5%)
  • USP 37 Oxygen NLT 99.0% by volume
  • Aviator’s Breathing Oxygen (ABO)
  • Breathable Air (BA)
  • Liquid Oxygen (LOX) Type II Grade A
  • CA OSHA 1910.134 CGA Grade D – for SCBA or Airline Respirators