Siemens sensors record and transmit readings extremely quickly and accurately, providing an optimal basis for precise and therefore energy- and cost-efficient control of the entire HVAC plant. Whether for measuring temperature, pressure, humidity, air quality, or airflow in rooms, ducts, or outside areas, Siemens offers a transparent, clearly structured range of sensors for typical HVAC measurements and applications. The range also includes multi-sensors that measure mixed gases, as well as sensors for special areas.