The main application of this Ionisation flame controller are all oil and gas-fired systems for which self-monitoring flame sensor systems are specified or recommended. The flame monitoring system 3000 is TÜV tested according to EN 298:2012 and approved according to DIN DVGW. It meets the requirements of TRD 411 to TRD 414and TRD 604. Because of its fully electronic continuous selfchecking functions the plug-in unit is approved for continuous operation and maintenance-free operation up to 72 hours.