The AIR41 Indoor Air Quality Sensor uses an advanced MEMS metal oxide semiconductor sensor to detect poor air quality. The sensor reacts quickly to detect a broad range of VOCs such as smoke, cooking odors, bio‑effluence, outdoor pollutants and from human activities. The sensor captures all VOC emissions that are completely invisible to CO2 sensors. The AIR4 provides a linear analog signal output of 0‑5 or 0‑10 Vdc for connection to a building automation system as well as an analog stepped output of 0‑10Vdc. Optional features such as a temperature sensor, manual override and adjustible relay output are available.