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.
Combined sensors simultaneously measure the concentration of carbon dioxide, volatile organic compounds (VOC), relative humidity and ambient air temperature, in various combinations. By means of one sensor we can comprehensively determine the status of the quality of the indoor air. The advantage of the combined sensors is therefore the reduction of the number of technical features in applications, which corresponds to the requirements of architects.