working principle of mcleod gauge in vacuum measurement

Whether you are embarking on a professional air conditioning service career or whether you want to be a home, DIY-type air conditioning mechanic, you will find out just how important a good air conditioning vacuum pump can be for the success of your enterprise. The air conditioning vacuum pump is just like a vacuum cleaner for the inside of an air conditioning system. By creating a high vacuum inside, the AC vacuum pump will "boil off" impurities and residues of refrigerant that are stuck on the internal walls. A high vacuum will pump out water molecules, thus preventing moisture condensation, freeze-on effects in the expander/evaporator, where the temperature is far below the water freezing temperature, and preventing oil-water buildup, or "sludge".