Hartmann & Braun Ag

Hartmann & Braun

Gerhard Franck

Walter Fabinski

Georg Taubitz

Guenter Rumpf

Josef Nevole

Apparatus for monitoring and correcting gas analyzers having a measuring chamber with an inlet and an outlet, and a pump for supplying a pressurized measuring gas, further includes a flow throttle for providing flow resistance and being connected to the outlet of the analyzer to obtain a gas pressure in the chamber above a level downstream from the throttle; a pressure transducer is connected to measuring gas pressure of the measuring gas upstream from the throttle but downstream from the pump, preferably also upstream from the analyzer; an output signal from the transducer is used for correcting errors of the measuring signal of the gas analyzer caused by variations of gas pressure in the measuring chamber on account of variations in the gas pressure, for using the same output signal to extract a rate of flow indication as to the measuring gas and for ascertaining that the flow remains within specified limits.

Monitoring pressure interference in gas analyzers

A sampling device for sampling a corrosive medium, is comprised of an inner tube with a flange and an outer tube with a flange, both made of a synthetic material; a metallic tube with flange is interposed between the inner and outer tubes to serve as armoring in this coaxial synthetic tube arrangement; the flange of the metal tube grips around the flange of the outer tube; and a recess in one of the synthetic flanges exposes a portion of the metal flange of the intermediate tube as a support surface for a fastening structure.

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Frankfurt-am-Main, Germany

Gerhard Franck