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The Varian 225-MS is the world's first mass spectrometer to enclose all of its components, including the foreline pump, in one compact design. For laboratories where space limitations restrict analytical capacity, the Varian 225-MS GC Ion Trap delivers excellent sensitivity and selectivity in an extremely compact unit.

The self-contained vacuum module yields a number of significant benefits:

• Because the turbomolecular pump is closer to the foreline pump, it can work at lower speeds and operating temperatures. THis reduces the background which allows improved sensitivity.
• For convenience, the module does not require oil changes during its lifetime.
• The much quieter vacuum module reduces noise in the laboratory.
• Elimination of the hose from the foreline pump to the turbomolecular pump reduces the space requirement significantly.