Carbon di:oxide liq. content meter - has gas permeable diaphragm in cell in contact on one side with carbon di:oxide contg. liq., and on another side with measuring liq.

摘要

The measuring apperatus is intended primarily for the beverage industry. It has a gas permeable diaphragm (2) in a measuring cell (1) in contact on one side with a testing liquid (PF), containing the dissolved carbon dioxide, while on the other side it is contacted by a neutral or basic, measuring liquid (MT). For the latter path, and in front of the diaphragm, is mounted a conductivity value detector (4). A second such detector (5) is provided in this path behind the diaphragm. A circuit forms a difference from both detectors output signals (54,55), which depends on the contents of carbon dioxide. Preferably the neutral liquid is treated, highly pure water of low conductivity in a closed circuit. The diaphragm may have a prefered thickness of 2 to 5 microns and it may be in the form of a hose. Alternately it may be a disc on a sieve (3).