​Four concentration alarms and four average alarms can be programmed on a freely selectable time base for each connected transmitter. If a gas alarm is detected, visual, audible and electrical indicators are activated so that suitable action may be taken.

​The device is configured using six keys and a two-line display. The equipment comprises a three-color LED [standard operation (green), warning (yellow) or alarm (red)], a built-in audible alarm, and five programmable relays.

​A VarioGard system can be individually put together and programmed, in accordance with customer specifications. VarioGard Transmitter, VarioGard Relay Module, VarioGard Converter Module and VarioGard Battery Module can be selected as modules. The three-wire digital bus cable for connecting the individual modules can be up to 1,100 m long.