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![Dwyer 478A Series [478A-0] Digital Manometer (-4 to 4 in w.c.)](image/cache/wp/gj/Products/Dwyer_478A-1-800x800.webp "Dwyer 478A Series [478A-0] Digital Manometer (-4 to 4 in w.c.)")
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.
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