The PMS1003 with Sensor Modules 64x42x23mm RoHS by Plantower is an electronic air quality sensing platform designed to detect levels of particulate matter in air. It is RoHS (Restriction of Hazardous Substances) compliant and is small enough to be included in a variety of applications, including air purifiers, air conditioners, and air cleaners, among others. The sensor module consists of a laser dust sensor, an infrared gas sensor, and a temperature and humidity sensor, all integrated onto a 64 x 42 x 23 mm circuit board. It is capable of detecting particles in the air that are as small as 1 µm in size, and is highly sensitive, enabling it to detect up to 5 particles in 1 second. Additionally, it works in temperatures ranging from 0°C to 50°C, and humidity levels ranging from 10% to 90%.