Desktop + Handheld


  • IAQ / HVAC applications
  • Measurement target: CO2, THi (Temperature-Humidity Index), Temperature, RH
  • Dual beam NDIR technology is used to measure CO2 concentration up to 5,000ppm
  • Temperature-Humidity Index (THi) indicates comfort conditions with the indoor environment
  • 3 LED displays indicate the status of CO2 / THi
  • Built-in Real Time Clock (RTC) & Micro SD Card
  • 8 Days Background Calibration (8BC)
  • ZG390C
  • ZG390C
  • ZG390C
    Relative Humidity
  • ZG390C
    SD Card
  • ZG390C
    3 LED Display
  • ZG390C


  • ZyAura ZG390C offers innovative multiple detectors, meters, and monitors for indoor air quality through CO2, THi (Temperature-Humidity Index), Temperature, and RH. The monitor operates with a customized CO2 alarm, Real Time Clock, and 8 days background calibration for excellent long term stability. It's ideal for the application range of business, enterprise, residential, construction, and occupational safety.

    Indoor Air Quality (IAQ) is measure for the quality of air in interiors, the comfortable indoor environmental quality can make people feel fresh, work efficiency and good for the health. The CO2 concentration is the important factor of good indoor air quality. People breath in oxygen and breath out CO2, nowadays people often close the windows to avoid noise and enjoy the comfort living and working environment provided by air-conditioning systems, which results in the fact that the indoor concentration of CO2 is far higher than outdoor average. With the high CO2 concentration and non- proper ventilation, people will feel headaches, dull, drowsiness, lose of concentration and correspond to the high levels of dust, chemicals and bacteria in the air.

    • CO2 Measurement Range: 0~5,000ppm (0.5%)
    • CO2 Accuracy: 0~3,000ppm: ±50ppm or 5% of reading, whichever is greater; >3,000ppm: ±7%
    • Temperature Measurement Range: 0-50°C (32~122°F)
    • Temperature Accuracy: ±1°C (±2°F) when the fan blows to the device directly, the accuracy of temperature is ±1.5°C
    • RH Measurement Range: 0~100%
    • Operating Conditions:
      1. 0°C~40°C (32°F~104°F), 0~95%RH, non-condensing, with lithium-ion battery
      2. 0°C~50°C (32~122°F), 0~95%RH, non-condensing, without lithium-ion battery
    • Power Supply: Rechargeable Battery (not included): Li-ion 3.7V Unprotected Button top 18650 battery*1pcs (L65~67mm, Ø18~19mm)(Battery Life: more than 4 hours @1800mAH)
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