Differential Pressure Digital Manometer, -4 to 0 to 4 inches WC
The Dwyer 478A differential pressure digital manometer can be used to measure positive, negative, or differential pressures. It features one-button auto-zero, ±1.5% FS accuracy and has an instant selection of up to nine English / metric units. Built to last, the 478A has a rugged aluminum housing and an auto power-off function to conserve battery life.