Handheld Air Particle Counter CEM DT-969 It is designed to measure a variety of air quality parameters like Particulate Matter (PM2.5 and PM10), Formaldehyde (HCHO), Temperature, Relative Humidity. It is equipped with a 2.4-inch color TFT LCD display (320×240), this Air particle counter device clearly shows multiple parameters with both numerical values and visual air quality indicators. This PM sensor covers a wide detection range of 0–2000 µg/m³ with 1 µg/m³ resolution, while the temperature range is 0–50 °C (±1 °C) and humidity spans 0–100% RH with ±3.5% accuracy in the mid-range. This HCHO sensor provides added insight into harmful indoor gases from furniture, paint, and building materials. This Digital particle counter runs on a rechargeable NiMH battery (approx. 1000 mAh) with USB charging and includes an auto power-off function to save energy. Applications:- Semiconductor device fabrication, biotechnology, pharmaceutics, disk drives, aerospace, HVAC & Ventilation Testing, Construction, Renovation Sites etc