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Thermo Fisher Scientific

Maintain the liquid nitrogen dewar

The MCT detector dewar should maintain its insulating vacuum for several years. If the vacuum leaks, the insulation will lose effectiveness and the following symptoms may occur:

  • Liquid nitrogen boils off much faster than usual
  • Water and atmospheric contaminants condensing on the detector window will show up in spectra as unwanted peaks
If your instrument shows any of these symptoms, the detector dewar may have a vacuum leak. Contact us immediately for assistance.
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