Alphasense NO2-A1 Nitrogen Dioxide Sensor
Electrochemical NO₂ cell for portable and fixed safety and air quality monitoring.
Manufacturer: Alphasense
Technical specifications
| Target gas | NO₂ |
|---|---|
| Measurement range | 0–20 ppm |
| Response time | T90 under 50 seconds |
| Principle | Electrochemical |
Manufacturer documentation
Official product information / technical documents →
Verify exact gas configuration, part number, calibration, response, environmental limits and applicable safety certification before equipment design-in. Product data can change between revisions. AirAlign is independent of the listed manufacturer.
NO2-A1 — negative electrochemical signal and ordered variant
Alphasense identifies NO2-A1 as a 0–20 ppm, three-electrode A-Series nitrogen-dioxide cell. The original product data quotes −250 to −650 nA/ppm sensitivity and T90 below 50 seconds for its stated step-test conditions. The negative signal polarity matters when designing the potentiostat, analog-to-digital chain and ppm conversion; incorrect channel polarity may conceal a real gas event.
The NO2-A1+ integrated smart/digital version is distinct from the analog NO2-A1 and must not inherit the same host interface assumption. Review other oxidizing gases, sample path losses and sensor temperature/humidity effects in the finished detector. The sensor’s service-life and response statements do not independently certify an occupational alarm system or an Ex installation.
Original manufacturer: Product specifications and documentation. Check current model suffix, revision and safety documentation before design-in.