Water pressure gauge consisting of a U-tube fixed by 4 clips on a stand graduated in mm.
At one end the reference pressure (atmospheric pressure) is applied and at the other end the pressure to be measured. The difference in liquid height corresponds to the pressure difference.
Adjustment to zero is simply done by sliding the tube.
Comes with a wooden base.
Dimensions (l x H) : 90 x 300 mm
Graduations: ± 10 cm, in mm