If you need to create a high vacuum, there are basically two options: turbomolecular pumps and diffusion pumps.

We may receive a commission on purchases made from links. HVAC professionals need a good vacuum pump to evacuate air, moisture, and contaminants from refrigerant lines before recharging older systems ...

THE ionization gauge is in almost universal use for the measurement of extremely low pressures, and whereas much careful work, for example, Dushman's classical experiments 1, has established its ...