Feature: 1. The 7‑in‑1 sensor module is a comprehensive air quality sensor that integrates CO2, laser dust, temperature and humidity, TVOC and formaldehyde. 2. Can detect the environment in real time, and output data through a certain protocol format, which is easy to use and has good stability. 3. With RS485 output, using British original chip, high sensitivity and stable. 4. Compact size, easy to carry and store, convenient to use and with good performance. 5. Supports calibration and can be connected to a computer through a communication cable (not included). Specification: Item Type: 7-In-1 Air Quality Sensor ModuleMaterial: Aluminum alloy + synthetic cardboard Application: Air purifier, air system, smart home, air monitor, etc. Detection Parameters: PM2.5, PM10, VOC, C02, formaldehyde, temperature and humidity Working Voltage: DC5V±0.2V (ripple must not exceed 200mv) Working Current: ≤125mA Working Environment: Working Temperature 0~50℃ Working Humidity: 15%RH-90%RH (non-condensing) Output Mode: UART at TTL level (3.3V) can freely switch between active response mode and passive response mode. Warm-Up Time: ≤3 minutesAppearance Size: Approx. 55.8 x 50 x 15mm / 2.2 x 2 x 0.6in Size: Approx. 55.8mm / 2.2in 50mm / 2in 15mm / 0.6in22.7mm / 0.9in 15.8mm / 0.6in 11.5mm / 0.5in 3.8mm / 0.1in 2.0mm / 0.1in Measurement resolution Measuring range Measurement accuracy eCO2 1ppm 400~5000ppm ±75ppm PM2.5 0.3ug/m³ 0~1000ug/m³ ±10% PM10 / 0~1000ug/m³ ±10% Temperature 0.01℃ 0~60℃ ±0.5℃ Humidity 0.04% 0~100%RH ±3%RH TVOC 1ug/m³ 0~1200ug/m³ ±12ug/m³ eCH2O 1ug/m³ 0~500ug/m³ ±3ug/m³ . Package List: 1 x 7-In-1 Air Quality Sensor Module Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.