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Moji China - AirNut

General Description

The AirNut sensor is a handheld device that provides real-time measurements of fine particles (PM2.5), Carbon Dioxide (CO2), temperature (C) and relative humidity (%).  

Principle of Operation

AirNut uses light-scattering to measure particles smaller than 2.5 micrometers in aerodynamic diameter. It converts the signal to a PM2.5 mass concentration, sends the data to a server via WiFi and displays the readings on a website and a cell phone application.


  • Dimensions: 8.4 (H) x 9 (D) (cm)
  • Weight: 468 g
  • Power supply: 5V USB cable
  • Sensor lifetime: N/A
  • Clock function: no
  • Sampling mechanism: fan
  • Detection time interval: daytime 15 minutes / night 1 hour
  • Environmental operating conditions: -20 °C – 70 °C, < 100% RH
  • Internal data logging: no
  • Data communication and logging: data uploaded through WiFi to a cloud
  • Data visualization: iPhone and Android apps
  • Weatherproof: No


  • Indoor Air Quality



    South Coast Air Quality Management District

    21865 Copley Dr, Diamond Bar, CA 91765



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