The newest air dryer in the Wabtec line is the AirSmart™ 994-600 series. The AirSmart™ bring state of the art technology to mobile air drying. Patented architecture and control allow the dryer to purge and switch only based on total demand and inlet conditions. The result is a uniform outlet humidity, drastic reduction in valve cycles and air usage. The data collected is monitored and used for activity based maintenance, fault detection and display and health checks at start-up and on demand. Data can be accessed and downloaded through the programming or real time through the Ethernet connection.