In article , Gunner says...

...the flame rod is a device that puts 100 or so volts on the flame
rod, which is exposed to the flame, and uses flame rectification to
convert this to dc and then to ground. It senses the ground path

Thanks, I've learned something today. I've never
seen those, all the flame decectors I've been aware
of are either thermocouples or CdS photocells.

Also the SiC ignitor modules in our oven - which always
seem to burn out at the *worst* time!

Jim

==================================================
please reply to:
JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com
==================================================