Coiled Platinum Wire Auxiliary Electrode with PTFE part. The coil 1 is 16 mm long and 4 mm diameter, made with a wire 0.5 mm diameter, with a purity of 99.95 %.; 3-Pack Reference Electrodes with Ag/AgCl in aqueous KCl; 3-Pack Reference Electrodes with Ag for non-aqueous solution; Simple Cell Set, including: - Teflon cap- Cell foot- Glass cell (4x); ItalSens handling costs; Gii-Sens - Pure, porous, 3D carbon nanostructure Sensing 50 Electrode; Integrated Graphene handling costs; Linxens OT5c Gold Electrode delivered in a reel of 100 sensors; Linxens handling costs; Screen-Printed Carbon Electrodes from FlexMedical Solutions; FlexMedical Solutions handling costs; Miniature Oxygen Electrode with Platinum wire of Φ 100 μm; BVT handling costs