MRK211A Stepper Switch, Air, Presair, 21A, Black Cam, 3-Function, Side Spout

Presair air switches deliver complete electrical isolation with zero voltage at the point of actuation. The air switching system connects the air switch to an air bellow using air tubing. When the air bellow is pressed, it sends a pulse of air through the tubing actuating the air switch. The Tinytrol Miniature Air Switch is available in both single and double pole, with alternate and momentary action. Presair’s air switching system is commonly used in pool and spa application, home appliances, medical applications, and many others!