Liquid laboratory gas meter

Wet gas meters operate in accordance with the displacement principle and are filled with a sealing liquid (water or oil). The intake and outlet of the gas is separated from each other by means of the sealing liquid. The gas enters in the centre of the drum.
On account of the removal of the gas at the exit side, a pressure drop occurs which causes the drum to rotate after overcoming the inertia and internal friction. The drum is equipped with five measuring chambers. During the rotation of the drum, the measuring chambers are filled with gas until they are totally immersed in the sealing liquid. That way they are separated from the opening of the gas intake. When the drum continues to rotate, the exit will be released, and the gas leaves the measuring instrument via the exit. The number of the measuring chambers multiplied by the number of rotations of the drum is equal to the measured volume. The instrument dial has a scale in litres and can depending upon size of the counter be read to an accuracy between 1/10 to 10 litres. A further scale allows the user to read the consumption in litres per hour. The fivedigit roller counter, which can be reset, displays the gas volume in cubic meters. On request, the meter can be fitted with a Namur pulser or a rotary pulser. It is recommended the rotary pulser is used with 100 or 1000 pulses/360°. Special versions up to 1500 pulses/360° are also available.