Analog refers to the “old school” systems that use a switch box in the cabin that sends a high current DC signal to electrically operated solenoid valves that control air entering and exiting the air springs. The amount of air pressure is controlled by the amount of time the user activates the switch. This technology was/is often found on mini trucks and hot rods because the large valves allow a large volume of air to move quickly.
Manual refers to a system incorporating four cockpit-mounted “paddle valves” that mechanically switch airflow from the tank into or out of the air springs. This cost-effective system has straightforward electrical connections and is the most lightweight of the three types. It also includes two dual-needle air pressure gauges to monitor and set pressures. If simplicity and low cost are high on your list of requirements, this is your system.
