rec_2
(2) The reliability of alternatives to Hersch Cells using cadmium for oxygen sensors in industrial monitoring and control instruments is not ensured where sensitivity below 10 parts per million is required. The use of cadmium anodes in Hersch cells for oxygen sensors used in industrial monitoring and control instruments, where sensitivity below 10 parts per million is required, should therefore be exempted from the prohibition.
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Source: EUR-Lex (Cellar) · retrieved 2026-10-19 · Text as adopted (Official Journal); later amendments are not incorporated in this text.