Nowadays, four out of five passenger cars have modern sensors to monitor and control the air inside the vehicle. They are designed to create a pleasant climate for passengers. In addition to pure comfort, however, sensor technology can also deliver safety-relevant benefits. Fast and reliable detection of refrigerants in vehicles caused by leaks from air conditioning systems prevents health risks to people and damage to the environment. And the contactless, continuous measurement of alcohol in the driver's breath helps prevent accidents on the road.