I use a MUI 30 to read the pump current to give me a flameout alarm. It doesn't need logical switches and sequencer. I have simply set it to alarm if current is below 0.5A. I am not sure why but it does not alarm when the system is switched on prior to engine start, it only alarms after a shut down. It does of course alarm when I shut the engine down after a flight but that doesn't bother me and it saves on the programming!