BS G 133:1951

This standard BS G 133:1951 Specification for electro-magnetic indicators for extra low voltage aircraft systems is classified in these ICS categories:

• 49.060 Aerospace electric equipment and systems

This British Standard applies to a single-pole or multi-pole indicator comprising a flag or shutter, operated electro-magnetically at a nominal voltage of 24 volts D.C., giving a visible signal appropriate to the state of the electrical circuit or circuits to which it is connected.