We can find environmental sensors used in the consumer sector in kitchens combined with alarm systems to observe the gas in the environment. Furthermore, they can be used to measure the level of CO2 in the various rooms of the house.

Another category that is part of this family is called PIR sensors (Passive InfraRed), sensors that measure the infrared rays (IR) radiated by the objects. These sensors are widely used as motion and temperature change detectors.