The P7640U universal mount differential pressure sensors provide reliable, accurate measurement and control. Proper applications include measurement of extremely low pressure applications such as: building/room pressure, air flow, variable air volume, filter status, and duct pressure. . The P7640 pressure sensors are designed with field-selectable 4-20 mA, 0-5 Vdc, or 0-10 Vdc output. 5 year warranty. Pressure Range (inches w.c.): 0-0.1, 0-0.25, 0-0.5, 0-1.0, 0-5, 0-10