Abstract: A method and apparatus for the continuous monitoring of process stream chemical process. The apparatus includes a canister or reservoir with a sampling chamber having an inlet for the process stream in an upper portion of the canister and an outlet returning the sample to the process vessel. The inlet and outlet are offset from one another and sized to maintain a positive pressure within the sampling chamber so that a turbulent flow pattern through the sampling chamber is established. A measuring device such as an electrode assembly depends into the chamber within the canister and transmits a representative signal to a remote analytical instrument. Entrained gases are removed from the upper portion of the chamber via conduit and valve.