Using the instrumentation developed by Steen-Larsen and Zannoni (2024), it is now possible to measure 17O-excess in water samples with a precision of 3 per meg. This represents a 2-3 fold improvement over current state-of-the-art laser analyzer systems. Such enhanced precision will enable the research community to address questions related to non-equilibrium phase transition processes in the atmospheric hydrological cycle and extract new information from the 17O-excess that was previously unattainable from d-excess alone. Non-equilibrium phase transition processes in the atmosphere, for example, occur whenever humidity gradients exist during either evaporation or condensation, such as ocean evaporation, below-cloud rain evaporation, or cloud ice crystal formations.