The system for the Autonomous Synthesis and Analysis of Battery electrolytes (ASAB) serves as an experimental tenant providing the capability to formulate electrolytes and measure ionic conductivity using a two electrode symmetric electrochemical cell. In FINALES it is registered with the quantities conductivity and electrolyte with the methods two electrode and flow, respectively. The in-house developed electrochemical cell is made up from a polytetrafluoroethylene (PTFE) body equipped with two oppositely positioned stainless steel screws with sanded surfaces serving as the parallel electrodes. The cell was calibrated using the results of repeated measurements of 1 m LiPF 6 in EC and EMC (EC:EMC 3:7 by weight) combined with data obtained from the empirical model reported by Ding et al. . Electrochemical Impedance Spectroscopy (EIS) measurements are controlled by a PalmSens4 potentiostat (PalmSens B.V., Houten, Netherlands) and the data are automatically analysed using the MADAP version 1.1.0. The 6 syringe pump modules and 10 eleven-port rotary valve modules (Cetoni GmbH, Korbussen, Germany) integrated into the ASAB hardware are used to formulate electrolytes starting from stock solutions. Since the optimiser requests formulations in mole fractions, while ASAB doses the stock solutions in volume fractions, the specifications of the formulations need to be transformed. The resulting formulations may only be approximations of the requested one, which is why the ASAB tenant reports the mole fractions obtained from the transformed formulations rounded to two decimals together with the corresponding ionic conductivity results. The hardware of the system is operated inside a nitrogen filled glovebox. Due to a lack of active temperature control inside the glovebox, the temperature is read manually from time to time and entered in a configuration file, from where it is loaded by the ASAB tenant and reported to FINALES together with the ionic conductivity results.