I am racking my brain trying to find a safety device to put inline with my hot surface ignition and gas valves. Right now I have it wired with a time delay relay so I flip a switch, the ignitor glows for about 5 seconds then the gas valve is energized. This will eventually be automated by the PID I plan on installing. I am looking for some type of flame sensing relay I suppose. No, I do not want to have standing or intermittent pilots. I do not want to use ignition modules as I already have 2 and do not like the prepurge time (20 seconds). Please help me figure this out, I know there is a way to do this but I just feel kinda lost right now. I want instant heat when My PID calls for it but I also want to make sure when it calls for heat that the burners actually ignite. I know you can do this with standing and intermittent pilots with spark igniters but I don't want to have to wait for anything on my boil kettle specifically. I would like on/off heat for that instantly. Hopefully we can come up with some ideas?