Johnson & Starley Thermocouples
A thermocouple is a device that is made of two different metals that produce a small electrical charge when heated on one side. This small charge turns on an electromagnet which opens a valve and allows the gas or water to flow through.
JOHNSON AND STARLEY 212S474 THERMOCOUPLE (MYSON R & MINOR S UP TO S/N 2001)
Part No: 1690350 / MPN: 212S474