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  • Ranges available:
    • -4 to 0 to 4 in w.c.
    • -60 to 0 to 60 in w.c.
  • ±1.5% full scale accuracy
  • 5 psig maximum pressure limit
  • Electronic zeroing
  • Extruded aluminum case
  • 4 digit LCD display

The Dwyer 478A Series Digital Manometers can be used to measure positive, negative, or differential pressures. The selectable pressure ranges are -4 to 0 to 4 in w.c. and -60 to 0 to 60 in w.c. with an accuracy of ±1.5%. The unit features selectable units, auto zero, hold and a 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.

Dwyer A-402A Carrying Pouch
Nylon carrying pouch, 7-1/2" x 3" x 2-1/4"
Dwyer UHH-C1 Soft Carrying Case
Soft carrying case


This product can be used in the following applications: