The Tecmark air switch control is designed for compatible pneumatic control applications using 120 or 240 volt operation with a 20 amp rating. Air switch controls are useful because they let the system respond to pneumatic input while switching line-voltage equipment in a more controlled and serviceable way.This replacement is especially useful when the original control has become inconsistent, has failed to switch properly, or no longer responds dependably to the connected air button system. Matching the correct voltage flexibility and amp rating helps preserve original system behavior.It is a practical choice when restoring reliable pneumatic equipment control is part of getting the installation back into everyday working condition. Tecmark air switch control for 120 or 240 volt applications 20 amp rated for compatible control systems Helps restore dependable pneumatic switching response Useful when the original control is failed or intermittent Supports more reliable operation of connected equipment