O-Rings for the HP/Agilent can be purcased directly from Agilent  but they can be rather expensive.  Now that the HP 5972 and HP 5971 is so old, finding the right o-rings can be problematic.

If your Autosampler has run thousands of samples like mine, it might be a little sluggish these days. Here's how to PM your Autosampler system and maybe get another six to twelve months of continued use from it.

Mass Spectrometry is a analytical technique that makes and sorts molecules based on mass.  In order to make and move ions, a sufficient vacuum is required.  In order to make a good vacuum, GCMS Mass Spectrometers need o-rings.

Most o-rings, once put in place are never disturbed and are good for years but eventually they need to be attended to.  Most are easy to get to and are inexpensive and can just be replaced.  Such as for the rough pump, diff pump, ion gauge, calibration valve, etc...