There are provided measuring units of measuring the amount of fluoride ions in the waste material from a fuel cell which receives a fuel gas and an oxidizing agent gas containing oxygen to undergo electrochemical reaction by which electricity is generated ...

An evaluatory unit (24) i.e. an integrated circuit (IC) has user-programmable function memories (FMs) (26a-26f) for different fuel cell monitoring functions. The FMs have logical AND/OR switching to generate an output signal (A) for switching the cells off...