Barber-Colman PC-110 Pneumatic Electric Switch

Barber-Colman PC-110 Pneumatic Electric Switch is a pneumatic-to-electrical pressure switch that converts 1–20 psi of air pressure into a SPDT electrical output for 120 VAC circuits, enabling automatic control of devices such as air compressors and fans. It supports surface- or track-mount installation and measures about 3-1/8 in x 3-1/2 in x 2-1/8 in (W x H x D). The PC-110 provides SPDT switching with adjustable differential and is rated for 13.8 A at 120 VAC (8.3 A at 240 VAC), making it suitable for controlling HVAC and other load equipment where a pneumatic signal governs electrical actuation. Common applications include controlling air compressors, fans, and pilot lights in HVAC and process-control environments.