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Nitrogen Dioxide


Alphasense Nitrogen Dioxide gas sensors operate using proven fuel cell technology.

Sensors are available in the following sizes:

A: 20mm diameter, the industry standard size for portable gas detectors

B: 32mm diameter package, the best choice for fixed site applications

D: miniature, with proven long-term performance. Sensors for the next generation of portable gas detectors

The NO2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 50 parts per billion (ppb) and an operating range to 20ppm. The sensors are suitable for use in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers.

The NO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification.

Application notes

Download Toxic Application Notes – see application notes for full details.

Sensor Specification Summary

Compare Alphasense Nitrogen Dioxide sensors – sensor specification summary.

Data sheets

Go to downloads page

File Name Description Type Download Link
NO2-D4 Miniature Data Sheet
NO2-B43F Compact, 4-electrode, low ppb Data Sheet
NO2-B1 Compact, unfiltered Data Sheet
NO2-AE Small, high concentration Data Sheet
NO2-A43F Small, 4-electrode, low ppb Data Sheet
NO2-A1 Small Data Sheet


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Each and every sensor is manufactured to the highest standards and tested for long-term reliability



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Download Data Sheets

Get data on our sensors Download Data Sheets

Download Application Notes

Get technical information Download Application Notes


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