Electrochemical process measurement arrangement

Abstract

The invention refers to an electrochemical process measurement arrangement (10) with a process sensor unit (30), the sensor unit (30) comprising: a reference electrolyte tank (50) with a reference electrolyte and a reference electrode (54), and a measurement electrolyte tank (60) with a measurement electrolyte liquid (62), a measurement electrode (64), a gas-selective membrane (90) separating the reference electrolyte (52) from a sample (13′) and a pressure balance channel (84) fluidically connecting the tank interior (56) with the atmosphere (11) . The pressure balance channel (84) is defined by a balance channel body (80) made of a hydrophobic material having a contact angle Theta higher than 90°. This allows to realize a very narrow pressure balance channel without the danger of being clogged by electrolyte droplets, so that the evaporation loss of the measurement electrolyte is significantly reduced.

Dependencies are inferred from the claim text.