The economical Model NS2 Adjustable Differential Pressure Switch Kit is designed for positive, negative, or differential pressure monitoring with actuation on pressure rise or fall in the building automation environment. The set point range can be field configured between 0.10 in w.c. and 10.0 in w.c. using the appropriate spring included in the kit. The kit includes a switch with quick-connect terminals, five different springs to change the set point range, orifice plugs to restrict air flow, mounting brackets, a hex wrench, and instructions.