Underground parking

Underground garages create urgently needed parking spaces in densely built-up cities. In the underground car parks, which are often several storeys deep, the air quickly becomes enriched with exhaust gases from petrol and diesel engines. Even when ventilation is available, gas detection devices have to be used to monitor carbon and nitrogen oxides in underground car parks so that health risks to people are minimised. GfG offers transmitters with dual sensors and suitable controllers for this purpose.

Gas monitoring in parking garages


In generally accessible underground car parks, mechanical ventilation and CO detection systems are prescribed by law in many places due to the high number of vehicles in a confined, closed space - and are generally advisable. However, it is not enough to control only carbon monoxide. Motor vehicle emissions contain other toxic gases such as carbon dioxide and, in the case of diesel engines, the nitrogen oxides NO and NO2. GfG offers transmitters with dual sensors for the simultaneous monitoring of two gases at one measuring point and has developed the GMA200-CT controller especially for the requirements of underground garages. In conjunction with the GfG transmitters, the controller monitors the gas concentrations in all parking levels and initiates appropriate measures such as a visual and acoustic alarm if a measured value is exceeded. The measurement-based ventilation control system provides fresh air in a targeted manner and saves energy costs.

Potential dangers:


» combustible and toxic gases
» emissions (CO, CO2, NO, NO2)
» confined spaces
» oxygen deficiency


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