Vent Check Plus – Portable CO2, Temperature & RH Sensor

Handheld Gas Detection

Poor indoor air quality is considered unhealthy because it causes tiredness, loss of ability to concentrate and even illness (e.g. Sick Building Syndrome). Indoor Air Quality (IAQ) monitoring, especially on CO2 levels and air ventilation, is becoming widely applied in public areas such as offices, classrooms, factories, hospitals and hotels. It is also suggested in regulations of industrial hygiene in some countries. This portable CO2 meter uses NDIR (Non-Dispersive InfraRed) technology to ensure reliability and long term stability. It is particularly useful in verifying HVAC system performance and air ventilation control. The Vent Check Plus detects carbon dioxide, temperature and relative humidity. The handheld unit also shows Time Weighted Average and Short-Term Exposure Limit.

Product Details

  • Triple displays of CO2, temperature and humidity
  • Stable NDIR sensor for CO2 detection
  • Statistics of weighted averages
  • Backlight for working in dark areas
  • Audible CO2 warning alarm
  • Easy manual calibration on CO2 and humidity
  • PC connect via RS232 interface
  • With hard carry case and power adapter



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We recommend Duomo Gas Detection products are serviced at least annually to ensure efficacy and extend sensor life. Our qualified team of engineers are available Nationwide.

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