Quickly verify filter condition, monitor cleanrooms, troubleshoot HVAC systems, or perform field calibrations with the Series 478A Digital Differential Manometer. The Series 478A is an indispensable tool for the HVAC technician, plant engineer, or industrial hygienist. The electronics are housed in a rugged extruded aluminum case to provide long life and exceptional durability.

The manometer can be used to measure positive, negative, or differential pressures. The unit features selectable units, auto zero, hold, and Min/Max function. Press the Hold key to freeze the current pressure measurement on the display. The 478A manometer includes a zeroing button to null out any minor pressure differences.

The Series 478A Digital Differential Manometer includes a quick start reference guide and a 9V battery.