Basic characteristics
of a CityAir station

The stations are designed for measuring particulate matter (PM2.5 and PM10) in the ambient air as well as basic weather parameters: air temperature, pressure, and humidity.

Measured parameter Value range Maximum permissible error Measurement method
Reduced, % Relative, %
PM2.5, mg/m3 0 – 0,1 ± 20 Optical
0,1 – 1,6 ± 20
PM10, mg/m3 0 – 0,1 ± 20 Optical
0,1 – 3,0 ± 20
Temperature, °С -40 ...+50 ± 1
Humidity, % 0 – 100 ± 3
Pressure, mm Hg 600 – 900 ± 1
PM2.5, mg/m3
Value range
0 – 0,1
Maximum permissible error, reduced, %
±20
Measurement method
Optical
Value range
0,1 – 1,6
Maximum permissible error, relative, %
±20
Measurement method
Optical
PM10, mg/m3
Value range
0 – 0,1
Maximum permissible error, reduced, %
±20
Measurement method
Optical
Value range
0,1 – 3,0
Relative, %
±20
Measurement method
Optical
Temperature, °С
Value range
-40 ...+50
Maximum permissible error
±1
Humidity, %
Value range
0 – 100
Maximum permissible error
± 3
Pressure, mm Hg
Value range
600 – 900
Maximum permissible error
± 1

Operation

CityAir stations can operate and continuously perform reliable measurements under a wide range of weather conditions:

Value range Environmental parameters
Temperature, °С -50 ...+50 Smog, rain, snow, frost, dust, wind, direct sunlight
Humidity, % 0 – 100
Temperature, °С
Value range
-50 ...+50
Environmental parameters
Smog, rain, snow, frost, dust, wind, direct sunlight
Humidity, %
Value range
0 – 100
Environmental parameters
Smog, rain, snow, frost, dust, wind, direct sunlight

CityAir stations allow for:

  1. Continuous real-time access to measurements results.
  2. Autonomous operation for 48 hours thanks to a built-in battery.

The next-generation stations will also measure the content of the following gases in the air:

Measured parameter Measurement range,
ppm
Measurement range,
mg/m3
Maximum permissible error Measurement method
Reduced, %Reduced, % Relative, %Relative, %
CO2 400 – 10 000 720 – 18 000 0,3 3,0 Infrared spectroscopy
CO 0 – 0,8 0 – 1 ± 20 Electrochemical
0,8 – 43,0 1 – 50 ± 20
O3 0 – 0,05 0 – 0,1 ± 20 Electrochemical
0,05 – 1 0,1 – 2 ± 20
NO2 0 – 0,06 0 – 0,11 ± 20 Electrochemical
0,06 – 1,1 0,11 – 2 ± 20
CO2
Measurement range,ppm
400 – 10000
Measurement range, mg/m3
720 – 18000
Maximum permissible error, reduced, %
0,3
Maximum permissible error, relative, %
3,0
Measurement method
Infrared spectroscopy
CO
Measurement range,ppm
0 – 0,8
Measurement range, mg/m3
0 – 1
Maximum permissible error, reduced, %
± 20
Maximum permissible error, relative, %
Measurement method
Electrochemical
Measurement range,ppm
0,8 – 43,0
Measurement range, mg/m3
1 – 50
Maximum permissible error, reduced, %
Maximum permissible error, relative, %
±20
Measurement method
Electrochemical
O3
Measurement range,ppm
0 – 0,05
Measurement range, mg/m3
0 – 0,1
Maximum permissible error, reduced, %
±20
Maximum permissible error, relative, %
Measurement method
Electrochemical
Measurement range,ppm
0,05 – 1
Measurement range, mg/m3
0,1 – 2
Maximum permissible error, reduced, %
Maximum permissible error, relative, %
±20
Measurement method
Electrochemical
NO2
Measurement range,ppm
0 – 0,06
Measurement range, mg/m3
0 – 0,11
Maximum permissible error, reduced, %
±20
Maximum permissible error, relative, %
Measurement method
Electrochemical
Measurement range,ppm
0,06 – 1,1
Measurement range, mg/m3
0,11 – 2
Maximum permissible error, reduced, %
Maximum permissible error, relative, %
±20
Measurement method
Electrochemical

Station Design

  1. Air duct for air exhaust
  2. GSM antenna
  3. IP56 enclosure
  4. GSM antenna
  5. PM2.5/РM10 particle content measurement module
  6. Module for data collection and transmission (WiFi, GPRS)
  7. USB service port
  8. 110–230 V, 50/60 Hz power supply unit
  9. Built-in battery (autonomous operation up to 48 hours
  10. Temperature, humidity and pressure sensor

Detailed specifications

The station’s sensors allow for:

  1. Measuring the PM2.5 and PM10 particle content in the range of 0 to 1.6 mg/m3. Maximum permissible relative error ±20%
  2. Measuring ambient air temperature in the range of -50 to +50°C. Maximum permissible absolute error ±1°С
  3. Measuring relative humidity in the range of 0 to 100%. Maximum permissible relative error ±3%
  4. Measuring atmospheric pressure in the range of 600 to 900 mm Hg. Maximum permissible absolute error ±1 mm Hg
  5. Establishing the station's position in the GPS and GLONASS systems. Permissible positioning error: 2.5 m CEP

Additional specifications:

  1. Measurement frequency is user-configurable: from 1 measurement per day to 1 measurement per minute.
  2. The obtained data is transferred to the server. GSM modem (GPRS) is the main data transmission channel.
  3. A built-in Wi-Fi module serves as an additional data transmission channel.
  4. Remote control of the station is available.
  5. The station can perform self-diagnostics, in automatic mode or upon remote request.
  6. The data on the station performance (errors, warnings, important events) is logged in a non-volatile memory and transferred to the server.
  7. The body frame has the IP56 degree of protection.
  8. Power: 110–230 V, 50/60Hz. Resistance to voltage drops from 80 to 400 V
  1. Operating conditions:
    1. Ambient air temperature: from -40 to + 50° C
    2. Humidity: from 0 to 100%
    3. Environmental parameters: smog, rain, snow, frost, dust, wind, direct sunlight.
  2. Alarm notifications (warning): in the event of unauthorized dismantling or breach, the station sends warning messages to the server
  3. Autonomous fully functional operation with maximum measurement frequency is enabled by a built-in storage unit for at least 24 hours under normal weather conditions (when the temperature is below 0°C, the heater turns on and quickly exhausts the battery).
  4. Turnaround period (before filter replacement and replacement/calibration of sensors) is 12 months.
  5. Station dimensions: 300x230x111 mm (excluding fasteners).