The XHAQSN-822 air quality sensor network monitor uses light scattering sensor technology to monitor particulate matter such as PM2.5, PM10, and TSP in the atmosphere, four-electrode electrochemical sensor technology to monitor gaseous pollutants such as CO, O3, SO2, NO2, and NO in the atmosphere, and PID sensor technology to monitor TVOC pollutants in the atmosphere. Optional functions include meteorological monitoring (temperature, humidity, atmospheric pressure, wind speed, wind direction), noise monitoring, video monitoring, and negative oxygen ions. It is suitable for monitoring particulate matter and gaseous pollutants in urban environments, construction sites, factories, mines, and other places. Main Characteristics A high-precision, large-range light scattering particulate matter sensor suitable for dust monitoring scenarios. The internal optical path self-cleaning design reduces the accumulation of dust on the internal optical components of the sensor after long-term operation, ensuring the long-term stability and validity of the data. The particulate matter sampling tube uses dynamic heating technology to reduce the impact of humidity on particulate matter values, and a humidity compensation algorithm simultaneously improves data accuracy. The particulate matter zero point automatic calibration technology solves the problem of zero point drift in the long-term operation of the sensor; The gas sensor uses imported electrochemical sensors and PID sensors to ensure a long service life. The electrochemical sensor uses four-electrode technology to reduce the effects of cross-interference gases. The gas chamber of the gas sensor uses constant temperature technology to eliminate the effects of temperature fluctuations on the electrochemical sensors; The instrument is equipped with a touch screen display, which allows you to view real-time data, historical data, etc. locally, and send monitoring data to a display platform. The data can be viewed on mobile phones, tablets, computers, and other devices. An optional LED display and three-color alarm light are also available; The instrument uses wireless 4G communication, a matching wired network port, 3 RS232, 3 RS485 serial ports; USB and other functions, local storage of more than 5 years of data and other functions; The instrument can be upgraded remotely and locally using SD cards, ensuring stable operation. It uses CAN bus communication for high expandability; Monitoring data is transmitted to the server in real time via wireless communication, and real-time measurement data can be viewed via a web page or mobile app.

Performance indicators for gaseous pollutants
Parameter		SO2	NO2	NO	O3	CO
Measurement range		(0–500) nmol/mol，extensible	(0–500) nmol/mol，extensible	(0–500) nmol/mol，extensible	(0–500) nmol/mol，extensible	(0–50) μmol /mol，extensible
Comparison measurement error	(0–100) nmol/mol	±15 nmol/mol	±15 nmol/mol	±15 nmol/mol	±15 nmol/mol	–
	(100-500) nmol/mol	±15%	±15%	±15%	±15%	–
	(0–10) μmol/mol	–	–	–	–	±1.5 μmol/mol
	(10-50) μmol/mol	–	–	–	–	±15%
Correlation coefficient r for comparative measurement		≥0.8	≥0.8	≥0.8	≥0.8	≥0.9

 

TVOC performance indicator
Measurement range	(0-50) μmol/mol or (0-20) μmol/mol selectable
Indication error	±5% FS

 

Auxiliary monitoring functions
Parameter	Measurement range	Solution	Indication error
Noise	30-130 dB	0.1 dB	±1 dB
Atmospheric temperature	-50-80℃	0.1℃	±0.5℃
Atmospheric humidity	0-100% RH	0.1% RH	±2% RH
Aerometric pressure	300-1100 hPa	0.1 hPa	±1 hPa
Wind speed	0-60 m/s	0.1 m/s	± (0.3±0.03V) m/s
Wind direction	0-360°	1 degree	–
Display unit	7-inch color touchscreen display with optional LED display
Data storage	10 years of locally stored data
Communication method	4G Full Netcom (optional wired)
Sampling method	Pump-operated
Sampling flow rate	1 L/min
Heating and dehumidifying	Dynamic heating
Auto-calibration	Automatic zero calibration
Working environment	Temperature: (-20～55)℃ Relative humidity: 0～95% (non-condensing)