A range of manometers measuring differential water pressures up to approximately 12.5m H2O. Scales are graduated in 1mm divisions.
1 meter scale differential pressurized water manometer (the air space above the tubes can be pressurized with the pump supplied)
1 meter scale differential open water manometer
1 meter scale differential water over Mercury manometer
500mm scale differential kerosene over water manometer
500mm scale differential water over Mercury manometer
