Feature: 1. [7 In 1 Detection] 7 in 1 environmental detector, which can detect seven parameters of temperature, humidity, PM2.5, PM10, CO2, formaldehyde, and TVOC. 2. [Stable Output] Professionally designed, this air quality monitor uses RS485 output (standard for Modbus RTU protocol) connection, the data is more stable. 3. [Real Time And Accurate] High accuracy sensors can detect the environment in real time, and output data through a certain protocol format, which is easy to use. 4. [Circuit Protection Structure] The design of multiple circuit protection structures protects the stability of the instrument and improves the stability of the instrument. 5. [Widely Applicable] The environmental detector can be wall mounted or ceiling mounted, suitable for building HVAC, building energy saving, smart home, hospitals, schools, airport stations, etc. Specification: Item Type: Air Quality Monitor Material: ABS Size: Approx. 90 x 34mm / 3.5 x 1.3in Uses: Widely Used in Building HVAC, Building Energy Saving, Smart Homes, Schools, Hospitals, Airport Stations, etc Detection Parameters: Temperature, Humidity, PM2.5, PM10, CO2, Formaldehyde, TVOC Working Voltage: DC5V±0.2V at 150mA Working Environment: Working Temperature -10~60℃ Working Humidity: 5~95%RH (Non Condensing) Communication Mode: A, Serial Port TTL Interface B, for Modbus RTU 485 Interface Warm Up Time: 5~10 Minutes, Semiconductor VOC Sensor, Theoretically Speaking, the Longer the Power on Time, More Stable Service Life: 3 Years (in Air) Installation Method: Wall Hanging, Ceiling Detection Parameters and Resolution:SensorMeasurement ResolutionMeasuring RangeMeasurement AccuracyeCO21ppm400~5000ppm±100ppmPM2.50.3 ug/m³0~1000 ug/m³±10%PM100.3 ug/m³0~1000 ug/m³±10%Temperature0.01℃-20~80℃±0.5℃Humidity0.04%5~100%RH±3%RHTVOC1ug/m31230ug/m3±90ug/m3CH2O1ug/m3500ug/m3±40ug/m3. Package List: 1 x Air Quality Monitor1 x Gusset Plate Note: 1. Do not place the product in an environment that is too corrosive, humid and high temperature.2. Manual measurement, please allow some errors.