The CO2 warning detector GX-D500 is a prof. Warning device with fixed alarm thresholds at 1.5% CO2 for pre-alarm and 3.0% CO2 for main alarm. The application is versatile, whether it is the monitoring of large CO2 bottles for water carbonators, the occupational safety during the processing and storage of dry ice or the reporting of increased carbon dioxide concentrations in small to medium-sized breweries or wine and fermentation cellars.The threshold value for the alarm, which is clearly visible both acoustically and optically, was deliberately chosen so high that poor ambient air through exhaled CO2 does not lead to false alarms by humans, but defects in technical equipment are detected immediately and safely. The exact alarm thresholds and the degree of protection are based on the specifications of the technical guidelines for beverage dispensing systems in the catering industry.The external sensor with IP54 degree of protection for spray water is pre-assembled with a 4 meter long 3