Abstract: A device for measuring the volume of a gas comprises a cylinder and a piston movably mounted in the cylinder. A first membrane sealingly connects the piston with the inner wall of the cylinder. The cylinder, the piston and the first membrane determine a measuring space in which a measuring conduit for the gas to be measured debouches. A second membrane also sealingly connects the piston with the cylinder inner wall. The first and second membranes determine an intermediate space in which an underpressure is generated during operation.

Abstract: The invention relates to a water separator for a gas analyzer with a water separation chamber formed in a housing, a supply and a discharge for the gas to be analyzed being connected with said chamber and a collection reservoir for the separated water being positioned below said water separation chamber. The water separation chamber consists of a conical and annular space having a diameter that decreases towards the collection reservoir and wherein the supply and the discharge debouch in that part of the annular space having substantially the greatest diameter. This results in a very effective separation of the water and the gas. A water lock can be provided between the annular space and the collection reservoir, said water lock limiting the dead space. The water separator can further be improved by cooling at least one wall of the annular space.

Abstract: In an apparatus for measuring the volume of a measuring gas, comprising a measuring bell that is movable upwardly and downwardly under influence of the measuring gas and that is suspended from one end of a flexible cable or the like cooperating with a balance device for the measuring bell, the measuring bell together with a stationary body creating a measuring space into which a measuring conduit for the measuring gas communicates, the balance device is constructed in such a manner that it remains operational in a range of measuring bell accelerations that exceed the gravitational acceleration. The balance device exists of a balance weight or a spring element.