CO and NO2 are two of the most common airborne contaminants in parking structures and pose significant safety concerns. When concentrations approach unsafe levels, the levels of CO and NO2 must be controlled or ventilated. It also can result in bad air quality, which is a business risk for owners.\n The concentration of CO and NO2 gas in enclosed areas may increase due to heavy traffic movements or a malfunction of the vehicle engine. Thus it is a standard practice to have CO and NO2 monitoring and control systems.\n The new generation of versatile EC Sense gas sensors are a cost-effective solution. They fit for small and large installations. Precise and selective measurement ensures an optimal result. This ensures the best operation of the ventilation system and maintains the required safety threshold for vehicle exhaust fumes.