They can last for a few hours up to weeks at a time. Also within this time frame after quitting, convulsions or seizures can occur, which is the point at which alcohol withdrawal can become dangerous if not medically treated. The symptoms may progress to delirium tremens (DT's) after three to five days without alcohol.
I would like to add that in US most of Instrument Ait pressure is 20-25 psi in the system and Plant (Service) Air pressure is 80-120 psi (about 7 atm). Both system require dryers, filters and some other equipment to do air conditioning.
Ambient Air Analyzer. The ambient air analyzer measures and tests VOCs and a large list of atmospheric gases. They let you easily collect and analyze air samples. Galsonâs air analyzers include the ambient air analyzer, dust/particulate, gas monitors, IAQ monitors, mercury monitors, ozone monitors. Mercury is, of course, important to monitor.