Electric and electronic controls for air compressors, air blowers, vacuum pumps, and air treatment apparatus and air treatment devices, namely, air dryers, air filters, air purifiers, air coolers, condensate drains and oil mist eliminators; Electric and electronic regulating devices for regulating gas flow of compressors, blowers, vacuum pumps, and air treatment apparatus and air treatment devices, namely, air dryers, air filters, air purifiers, air coolers, condensate drains and oil mist eli...