1. AHT21, a generation of temperature and humidity sensor, sets a benchmark in compactness and intelligence. It features an embedded, doublerow, flat, lead SMD package suitable for reflow soldering, with dimensions of 3 x 3 mm at the base and a height of 0.8 mm. 2. Air quality sensors for home and building automation, consumer electronics, household appliances, and air purification systems. 3. The sensor delivers a calibrated digital signal in standard I2C format. The AHT21 incorporates a newly developed ASIC, an enhanced capacitive semiconductor humidity sensing element, and an onchip temperature sensor, achieving significantly improved performance and surpassing the reliability of previousgeneration sensors. 4. The ENS160 is a digital multigas sensor designed for indoor air quality monitoring, offering precise detection of various gases and volatile organic compounds (VOCs), including toluene, hydrogen, ethanol, and NO2.