Quadfurcated

The gasketed slidewire has a quadfurcated contactor for assuring that at least one or more contacts provide electrical continuity at all times despite the presence of dust or vibrations, it is claimed.

A combustion flame is fed by a diverted portion of a process stream and the common end of a bifurcated or quadfurcated fiber-optic light guide is adapted to collect light from the flame.