These inexpensive manometers measure positive, negative and differential pressures.

Dwyer® Flex-Tube® U-Tube Manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction.

Columns are of .375" O.D. flexible and shatter proof clear butyrate tubing. 

They are easily accessible for cleaning. Indicating tube is backed by white scale channel to provide maximum color contrast.

Scales are extruded high impact polystyrene plastic, formed to hold columns in perfect alignment. Stark white scales have graduations and numbers silkscreen-printed in black for maximum legibility.

You can choose from numerous models and features including over-pressure safety traps, in full scale ranges from 8" to 36" of water or mercury. 

All are suitable for total pressures to 100 psi - for determining velocity and static pressures, leakage, fan and blower efficiency, filter resistance, and gas pressures. Ideal wherever a portable, direct reading manometer is needed. 

Standard ranges and markings as shown, or special ranges, colors, logos and brand names for OEM quantity orders are available.