Carbon monoxide poisoning, which threatens people, can be of two types: continuous or sudden. The systematic poisoning, which can be very slow, occurs when people are in the room where constantly leaks CO.
Combined sensors are designed to measure the quality of the indoor air, which make it possible to measure several physical quantities at the same time. According to the measured values of the monitored variables is then possible to control the ventilation units. The advantage of the combined air quality sensors is very simple and cost-saving installation in the air ducts.
Air humidity is a meteorological element that describes the amount of water vapour in the air that is contained mainly in the lower levels of atmosphere and that is originated by evaporation from large bodies of water, soil, plants, animals, etc.
Regulation of the indoor air quality is a prerequisite not only for the well-being and high working performance. Contamination of the indoor air in buildings is often even higher than the outside air pollution. We can not therefore take into account only the concentration of CO2.
Are you lost in the technical terms associated with measuring the concentration of different substances in the air? Sensors for measuring CO2, CO, volatile organic compounds, etc. operate on three fundamental principles from which lately is the most commonly used the NDIR principle. What does NDIR mean and how do the sensors work on this principle and on other ones?