Low Pressure Sensor with 0-30"wc, 0-15"wc, 0-7.5"wc, -15"wc-15"wc, -7.5"wc-7.5"wc, or -3.75"wc-3.75"wc field selectable pressure ranges, 4-20mA 2-wire Output, 12-40Vdc Supply voltage, and NEMA 4 Enclosure