4-NO2-20 Nitrogen Dioxide NO2 Gas Sensor, 0-20ppm NO2

Product Code: 2112B0321400

Quick Overview

4-NO2-20 gas sensor, 0-20ppm NO2 (3 pin)

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4-NO2-20 Nitrogen Dioxide NO2 gas sensor

Measuring Range: 0-20ppm NO2. Maximum overload: 250ppm NO2

Size: 4 SERIES, 3-electrode

Part no: 2112B0321400


  • NO2 sensor in standard 4 series industry size
  • Proven high stability, reliability and fast response
  • Robust at humidity and temperature extremes
  • Compact sensor design
  • Low cost
  • Ideal for portable and fixed applications including industrial and environmental monitoring


This compact electrochemical sensor is a high quality, cost effective electrochemical cell for the detection of Nitrogen Dioxide in air. The 3-electrode robust design is ideal for both portable and fixed applications in industrial and environmental monitoring. This version is available for 0-20ppm NO2 measurement with 250ppm NO2 maximum overload.

Directives to limit and decrease Nitrogen Dioxide emissions are becoming more commonplace around the world. Power stations and traffic are the main sources. Major road networks and urban areas have the highest levels of Nitrogen Dioxide. However, in homes with gas stoves, kerosene heaters, or unvented gas space heaters, indoor levels often exceed outdoor levels and put at risk people’s health. This solution is particularly popular for monitoring levels in underground car parks.

Note: The graphic of this sensor is an example only and sensor cap/body colour may vary depending upon gas sensor type ordered or manufacturing modification. Please refer to individual datasheet for detailed information on this sensor and its dimensions.

Available options/alternatives:

– miniature i2c/voltage precalibrated transmitter available for this sensor, including low range calibrations for air quality

– NO2 2E gas sensor, 2-electrode, 0-20ppm NO2 

– NO2 2E 4-20mA transmitter including sensor and installation kit, 0-20ppm NO2 (part no. 2112B9999)

– NO2 Gas Measuring System – NO2 2E sensor, 4-20mA transmitter and installation kit in aluminium housing, 0-20ppm NO2 (part no. 2112B9995)

– Micro size NO2 solid state gas sensors with i2c/voltage transmitter board options

– SS 0-4.8V transmitter including solid state gas sensor, 0-100ppm NO2 (part no. 2112B013450)

– NO2 SS7 sensor (7 series), 0-20ppm NO2 (part no. 2112B0321700)