C. W. Cox manufactures several water manometers to compliment our line of flowmeters. The manometers attach to hoses frominstruments, through the valves at the bottom, and provide a differential pressure reading which is then translated into a flow rate in gallons per minute.
The Hall Tube manometer is 36″ in length and is calibrated specifically for that instrument. This scale reads in Gallons Per Minute / Square Inch of Inside Diameter.
The Collins Tube manometer is 48″ long, is calibrated for that instrument, and is scaled in Feet/Second.
In addition, there is a 60″ manometer that is usually scaled in inches and 10th inches, but can also come with either the Hall or Collins scale in the same scale.
The valves at the bottom will allow water to be bled from the manometer, or let air bleed from the hoses. The valve at the top will also bleed water from the manometer. The Schraeder valve at the top allows air to be pumped into the manometer.
All manometer scales can be used with the velocity-to-quantity slide rules which come with the Hall and Collins pitot tubes.
All manometers are built of sturdy aluminum and brass materials for high corrosion resistance and long life. Upgraded high quality valves, (shown) have o-ring seals and directional handles.