Nitrogen Dioxide Monitor

The Aretas Nitrogen Dioxide (NO2) gas monitor is an easy to install wireless system that displays data online, sends alerts via text or email and much more. The NO2 monitoring equipment can include other sensors such as CO, CO2, O3, and VOC to provide you with accurate information about your indoor environments. Secure cloud based data allows decision-makers and maintenance staff to monitor VOC levels from anywhere at anytime.

Contact a live Aretas representative today to discuss how we can help meet your unique monitoring needs (877) 218-6232

This wireless nitrogen dioxide monitor can detect NO2 at 0 - 20ppm, and record and transmit the NO2 data to a wireless bridge for immediate online access. The NO2 detector comes standard with Temperature and Relative Humidity sensors offering more in depth data as well potential energy-saving and money-saving opportunities.

  • Collect: Online data analytics, graphs, maps and archive data logging for quick decisions
  • Decide: Review one or more monitors and facilities 24/7 worldwide
  • Respond: Alerts sent via text or email to the appropriate team members
  • Simple: Wireless for easy installation
  • Solutions: Customizable solutions include the sensor mix you need

Why is monitoring NO2 important?
Nitrogen Dioxide is a highly reactive oxidant and corrosive. The primary sources indoors are combustion processes, such as unvented combustion appliances, e.g. Diesel engines, gas stoves, vented appliances with defective installations, welding, and tobacco smoke. NO2 also plays a major role in atmospheric reactions that produce ground-level ozone, a major component of smog.

In people with asthma, exposure to low levels of NO2 may cause increased bronchial reactivity and susceptibility to respiratory infections. Long-term exposure to high levels of NO2 can lead to chronic bronchitis. Studies show a connection between breathing elevated short-term NO2 concentrations, and increased visits to emergency departments and hospital admissions for respiratory issues, especially asthma

Call Toll Free (877) 218-6232  |  Live Chat with a representative |  Email Support


At no additional charge most of our monitoring solutions include temperature and humidity monitoring to determine if energy savings opportunities exist, allowing you to offset the cost of NO2 and other monitoring needs.

  • Wireless frequency 802.15.4 (Does not interfere with standard IEEE 802.11 frequency).
  • 900MHz / 868MHZ (xbee, zigbee)


  • Range: 0 - 20 ppm
  • Resolution: 0.1 ppm
  • Accuracy of Calibration: <0.9 ppm
  • Response time: <35 s
  • Operating temperature: -20 to +50 °C
  • Operating humidity: 15 to 90% RH 
  • Pressure range: 90 to 110 kPA

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