The number of motor vehicles is increasing worldwide. This also results in more and more requirements in the field of gas monitoring of vehicle exhaust gases, which are dangerous for the human body. The requirements were defined by the Swiss Association of Building Technology Engineers in the SWKI guideline VA103-01 and are now the cornerstone for planning every garage ventilation.
CO
Exhaust gases from gasoline engines
Carbon monoxide (CO) forms when gasoline is incompletely burned. The proportion is highest during the starting process of an engine. It is completely odorless and colorless. At the same time, CO is a highly toxic (poisonous) gas that is deadly even in small amounts. To put it simply, the absorption of CO hinders the oxygen supply; the oxygen transport in the blood of the human body is massively impaired. Since humans do not have any sensory organs to protect them from this, suitable gas sensors are used for reliable detection.
NO2
Exhaust gases from diesel engines
Nitrogen oxide (NO2) forms when diesel is burned. NO2 is a very strong respiratory poison, damages the mucous membranes and irritates the eyes. NO2 is responsible for cough, bronchitis and even pulmonary edema. Humans can recognize NO2 through their sense of smell, since it smells similar to chlorine, but the concentration emitted by car exhaust gases is usually not sufficient to be perceived with the sense of smell. Here, too, a gas sensor must be used for reliable detection.
| CO | NO2 | |
| 50 ppm | 0.8 ppm | Ventilation 50% |
| 70 ppm | 1.2 ppm | Ventilation 100% |
| 200 ppm | 2.0 ppm | Alarm / Evacuation |
Exhaust gases are measured with CO/NO2 gas sensors in underground car parks, multi-storey car parks and garages. In a first step, the ventilation system is started up, and if this does not sufficiently reduce the concentration of gases, optical and acoustic signals warn to evacuate the facility.
Components
The gas control panel is the central evaluation unit and monitors the exhaust gas values of all sensors. The switching values are configured on the control panel, and the ventilation and warning signal generator are controlled.
The ME 1250 CO/NO2 combination sensors measure gasoline and diesel exhaust gases and forward the measured values to the gas control panel. The sensors must be recalibrated annually and the measuring cells must be replaced periodically.
The LED warning panels with built-in siren warn people in the danger area.
Offer
Müller-Elektronik AG is your specialist for exhaust gas warning systems CO/NO2. The gas control panels from Müller-Elektronik AG not only protect against exhaust gases, but also enable the ventilation system to be operated economically thanks to periodic ventilation and a dehumidification program. From project planning to annual maintenance, the Müller-Elektronik AG team is here for you.
