Each detection point of your fixed gas monitoring system consists of a remote sensor and a control module, which are connected by means of a remote sensor cable. The GMA 304 powers up to 4 remote sensors and receives and processes their sensor signals. It monitors the ambient air for the presence of toxic or combustible gases and vapours or for its oxygen content.

The GMA 304 is a development from the GMA 100 and offers an additional variety of features, which allow to adapt the gas monitoring system to your specific requirements:
  - Connection of up to 4 remote sensors to only one controller.
  - Sensor signal filter and linearisation.
  - CAN Bus for data transfer to a computer.
  - Alarm for rapid rise of the gas concentration, even before pre-set levels are exceeded.
  - Variable setting of three gas alarm thresholds.
  - Time delay for the alarms.
  - De-activation of alarms only when the relative threshold is deviated (alarm hysteresis).
  - Relays for alarms and failure.
  - Levelling of sensor signals to avoid false alarms.
  - 4 - 20 mA analog output signal.