Which one is better, air Regulator or air Compressor

The standard or general purpose regulators feature an accuracy level. You can expect the accuracy of the pressure that runs through your system to fall between those ranges. An air regulator is used on an air compressor. However, while many i/p transducer ships from the factory with a regulator installed. You may have to buy a separate regulator for compressor.

When shopping for your air regulator, be sure to check with online sources. There are a great number of retailers who sell both general purpose and higher-priced precision versions at a substantial discount as compared to what you would pay at your local hardware store or home center.

The air pressure regulator uses a series of springs and a diaphragm to provide a constant air pressure level.  The regulator is a must-have for those who are using an air brush. If you are attempting to paint an item with an air brush and the pressure cycles up and then down, the quality of your paint job is bound to be affected.