Gas measuring controller series for continuous monitoring and warning of toxic, combustible and refrigerant gases and vapours. The Gas Controller series MGC-04 can monitor up to 24 analog gas transmitters with 4 to 20 mA signal. Five alarm thresholds are adjustable to each channel. For activating the alarm up to 20 relays with changeover contacts are available. The free adjustable parameters and alarm threshold enable a very flexible use in the gas measuring technique. Simple and comfortable commissioning is granted by the factory adjusted parameters. The configuration, parameter settings and operation is easy to do without programming knowledge. The Gas Controller MGC-04 is equipped with a self monitoring system and with a power supply monitoring. The analog inputs are monitored to detect short-circuit and wire break. Additionally the gas controller is available with emergency power supply.