SIT 820 NOVA 1/2" Thermo-electric flame monitoring. Restart interlock, unintended re-ignition of the main burner is not possible. Pilot flame adjustment with integrated, maintenance-free filter in gas connection. Pilot gas adjustment. Solenoid valve with low energy consumption, low noise generation and plug-in connection. Servo-controlled pressure controller providing constant gas pressure for main burner. Pressure gauge connection for gas inlet and output. Thermo-element connection on top. Also possible from below by changing the TE connection.