Series DDP switches provide dual switching action for the many control and alarm functions that require both high and low actuation points. DDP’s have two separately-operated, independently-adjustable SPDT snap switches mounted on a common foot bracket. An adjustable “dead band” is established between the two independent set points which enables control circuits requiring both high and low actuation points. Two standard ranges cover set point differentials up to 2”wc or 12” wc. Optional snap-switch enclosures are available.