The LiftMaster 50-102 Exterior Air Switch is an SPDT, dry-contact control switch designed for wet or harsh environments where electrical pushbuttons are impractical. Activated by air pressure through a connected pneumatic line, it converts the air impulse from a remote bulb or hose into a reliable electrical contact change (common, normally open, and normally closed). This makes it a practical replacement part or upgrade for car wash doors, commercial rolling doors, and gate operator control stations that need a weather-resistant activation method. Its exterior-rated housing helps protect the internal switch from moisture and debris, supporting dependable operation in demanding applications.
Engineered for compatibility with LiftMaster commercial door and gate operators that accept SPDT dry-contact inputs, the 50-102 can be wired to typical control terminals for functions such as open, close, or cycle, depending on the operator’s control logic. Installation involves mounting the enclosure in an appropriate location, attaching the pneumatic tubing from the remote air bulb, and landing the low-voltage control wires per the operator manual; no programming is required. For safety, installation should be performed by qualified personnel with power removed, and the system should be tested to confirm the correct NO/NC orientation and proper response. This exterior air switch supports universal pneumatic actuation needs in washdown, outdoor, and industrial settings while maintaining straightforward integration with LiftMaster control systems.