The digital signal processing allows unparalleled flexibility in the monitoring system. The GMA 300 can filter measurement signals, suppress zero point deviations, delay or accelerate alarms or, by recognizing certain trends, activate an alarm even before a dangerous gas concentration is reached. Three variably adjustable alarm thresholds can be set, which may be latching or self-resetting. You can activate or alter functions and calculation parameters, to adapt the complete monitoring system to specific measurement tasks. A service key prevents unauthorized access to the program. Zero point and span adjustment can be checked and corrected on the front keyboard, thus simplifying service efforts and saving maintenance costs considerably.

The GMA 300 provides four potential-free relay outputs for alarm and failure. They can be used for turning on alarm horns or lamps, or for stopping production processes (e.g. closing valves or switching off current). The relays can be operated as either normally closed (NC) or normally open (NO) contacts. The measurement values are available as an analog output signal of 0–10 V and 4–20 mA. The correct unamplified sensor signal (0–1 V) and the standard signal (0–10 V) can be verified without opening the unit. Four logical outputs allow the activation of collective gas or failure alarms. Measurement data, alarms and service data are all available from the GMA 300's CAN-Bus digital interface. The data can be sent to any computer for processing by the specially developed GfG Instrumentation recording and documentation software.