Nitrogen Dioxide (NO2) Gas Detector

Nitrogen Dioxide (NO2) Detectors are used in applications such as bus- and truck garages, under ground garages, road tunnels, engine repair shops, tunnels, engine test benches, shelters, mountain cavities, loading bays with diesel engined vehicles.

Nitrogen Dioxide (NO2) Detectors are used to warn when the quantity of harmful gases reaches an unhealthy level.

Nitrogen Dioxide (NO2) Detectors are used to ensure that the management of ventilation is done the best and most profitable way, ie. according to fresh air requirements.

When the concentration of Nitrogen Dioxide (NO2) becomes too high, the fans starts automatically and stops again when the Nitrogen Dioxide (NO2) concentration has down to the predetermined level.

The Nitrogen Dioxide (NO2) Detectors have a built-in electrochemical Nitrogen Dioxide (NO2) sensor.

Numbers of Nitrogen Dioxide (NO2) Detectors per square meter is different depending on local regulations, country regulations and applications.
Recommended (role of thumb) is one Nitrogen Dioxide (NO2) Detectors per 400 m2.

Mounting height for Nitrogen Dioxide (NO2) Detectors is 0.2 meter above floor.


Nitrogen Dioxide (NO2) gas detector for wall mounting without LCD display,
RNO2 20.

Nitrogen Dioxide (NO2) gas detector, wall,
with 3 meter cable and remote sensor, without LCD display
RNO2 20 RS3.

Nitrogen Dioxide (NO2) gas detector for duct mounting without LCD display,
RNO2 20 DM.

Nitrogen Dioxide (NO2) Gas Detector RNO2

  • IP65 protection for both enclosure and sensor
  • Outputs
  • • 2 x 4-20 mA or 0-10 Vdc, user settable
    • RS485, Modbus RTU protocol

  • Power supply
  • • 24 Vdc
    • 24 Vac as option

  • Ranges:
  • • RNO2 20 with range 0-20 ppm
    • RNO2 100 with range 0-100 ppm

  • Electrochemical sensor

Read more about
Nitrogen Dioxide (NO2) Gas Detectors RNO2-series (UNDER CONSTRUCTION)


Nitrogen Dioxide (NO2) Gas Detector NO2W-series

  • Replaceable Electrochemical Cell (sensor)
  • Measuring ranges
  • • 0-5 ppm, 0-10 ppm, 0-20 ppm or 0-30 ppm,
    selectable ranges with DIP switch

  • Analog outputs
  • • 0-10 Vdc, 2-10 Vdc, 4-20 mA, 0-5 Vdc or 1-5 Vdc

  • Response time
  • • 1 sec, 5 sec, 30 sec or 60 sec,
    selectable with DIP switch

  • Zero-Span Calibration & Linear output
  • Power supply 24 Vac/dc
  • IP ratings
  • • IP65 for enclosure
    • IP41 for probe

  • Accuracy  ±3 %
  • t90 < 50 sec.
  • Sensor life time 2 years expected
  • ”Options”
  • • Modbus RS485 communication
    • LCD Display
    • 2 x relay outputs, user can set any level
    • Buzzer

Read more about
Nitrogen Dioxide (NO2) Gas Detectors NO2W-series


Installation guidelines (FAQ)

for Carbon Monoxide (CO) gas detectors and Nitrogen Dioxide (NO2) gas detectors in underground garages, parking houses and tunnels.

>> Read more


Facts about Nitrogen Dioxide (NO2) gas and Nitrogen Dioxide (NO2) Gas Detectors

Nitrogen Dioxide or NO2 gas is reddish-brown in color with a sharp characteristic and with arctic odor is a protuberant air pollutant. This Nitrogen Dioxide (NO2) gas mostly found in industries where diesel is used as fuel. Exposure of this Nitrogen Dioxide (NO2)gas have harmful reactions over our body parts like eye, throat etc. More exposure of this Nitrogen Dioxide (NO2) Detectors can be the cause of death. So protection from this Nitrogen Dioxide (NO2) Detectors is very necessary and important. In this regard Nitrogen Dioxide (NO2) Detectors can help to a great extend to avoid the risk related to this injurious Nitrogen Dioxide (NO2) Detectors.

Nitrogen Dioxide (NO2) Detectors can detect the gas quantity and warn when the amount of harmful Nitrogen Dioxide (NO2) Detectors touches a harmful level. This type of Nitrogen Dioxide (NO2) Detectors are used in different applications liketruck and bus garages, road tunnels, underground garages, engine repairing shops, engine test benches, tunnels, shelters, loading bays with diesel-engine vehicles, and in other places where fuel is diesel such as any industry. Nitrogen Dioxide (NO2)is produced when hydrocarbons burn. Arrangement of these Nitrogen Dioxide (NO2) is a good investment to avoid health problems and to avoid different expenditures. For example if a bus garage have this detector, then the workers get warning if the harmful Nitrogen Dioxide (NO2)gas level increase and can do their job properly.

To make sure that the arrangement of ventilation is properly done Nitrogen Dioxide (NO2) Detectors are used. Fresh air must be present as per requirement quantity for a healthy environment. When the level of Nitrogen Dioxide (NO2) becomes high, the fan of the detector starts spontaneously and stops again when the level of Nitrogen Dioxide (NO2) has down to the required level. These Nitrogen Dioxide (NO2) Detectors have a built-in sensor to detect this unhealthy Nitrogen Dioxide (NO2)gas. When Nitrogen Dioxide (NO2)gas level is high, you can also listen a warning horn if installed. This horn indicates that your environment needs fresh air to reduce this unhealthy Nitrogen Dioxide (NO2)gas.

Nitrogen Dioxide (NO2) Detectors can measure 0-1 ppm , 0-5 ppm, 0-20 ppm and 0-100 ppm These Nitrogen Dioxide (NO2) Detectors not only try to minimize the harmful gas level but also warn you about the situation. So, you can aware and arrange proper ventilation in your work area.

These Nitrogen Dioxide (NO2) Detectors will help you to manage and work in a healthy environment. Many diseases spread due to Nitrogen Dioxide (NO2) gas. If you are aware about the advantages of Nitrogen Dioxide (NO2) gas, you will escape from mishaps occur due to this harmful Nitrogen Dioxide (NO2) gas in air. Industries can use these Nitrogen Dioxide (NO2) Detectors Detectors to provide a healthy environment and can avoid risks that may occur due to Nitrogen Dioxide (NO2) gas.


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