Detection of hazardous gas concentrations is signalled by the activation of optical and acoustic alarms and the activation of relevant alarm outputs. The detectors are equipped with a signalling module, which ensures simple and cost-effective operation. Horns (sirens), flashers (beacons), or combined acoustic-optical signals are a standard part of the gas detector accessories range. Sirens and beacons are designed for the sound and light presentation of gas concentration alarm states. Both sound and light signals have a sealed construction protected against moisture and dust, which means they can be used indoors and outdoors.
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