The variety of metal sensors includes a platinum ring sensor for all redox titrations, silver ring sensors for precipitation titrations, and a double-platinum pin electrode for amperometric or ...

Langdon, C. "Determination of Dissolved Oxygen in Seawater by Winkler Titration Using the Amperometric Technique," IOCCP Report No. 14, GO-SHIP Repeat Hydrography Manual: A Collection of Expert ...