DFRobot SGP40 Air Quality Sensor (Breakouts) are a digital VOC sensor chip that is based on the CMOSens® technology. These sensors offer a complete sensor system on a single chip, a temperature-controlled micro-hotplate, and a humidity-compensated indoor air quality signal. The SGP40 sensors operate from 3.3V to 5V power supply range, -10°C to 50°C operating temperature range, 0%RH to 90%RH humidity range, and 2.6mA operating current. These breakout air sensors are used in applications such as air purifiers, kitchen hoods, demand-controlled ventilation, thermostats, and indoor air quality monitoring. The breakout boards are available in two boards: The Gravity sensor board and the Fermion sensor board. The Gravity SGP40 sensor is available with Gravity-4P I2C/UART sensor cable and the Fermion SGP40 sensor comes with a 2.54-4P black single-row connector.