Abstract: A method for monitoring consumption of at least one consumable in a mass transfer system. The method includes providing at least one accurate mass transfer apparatus configured to provide mass transfer of a gas into a liquid to generate a liquid output, wherein the relative amounts of liquid and gas are set, and for each mass transfer apparatus: measuring the amount of liquid output, and determining, based on the amount of liquid output and the relative amounts of liquid and gas, a quantity of at least one of the gas and liquid consumed in that mass transfer apparatus.

Abstract: According to one aspect, a system for controlling mass transfer of a gas into a liquid. The system includes a mass transfer apparatus configured to provide the mass transfer of the gas into the liquid, a temperature sensor configured to monitor the temperature of the liquid provided to the mass transfer apparatus, a pressure sensor configured to monitor the pressure within the mass transfer apparatus, and a control unit configured to communicate with the temperature sensor and the pressure sensor. In response, the control unit adjusts the pressure within the mass transfer apparatus to encourage reaching an equilibrium condition within the mass transfer apparatus and provide for consistent gas absorption into the liquid.