Node/Pro maintenance and sensor recalibration

The AirVisual Pro is an industry-grade air pollution monitor, with top quality components. The device itself should not require particular maintenance, as long as it is sheltered from weather conditions such as wind, rain, too much sunlight, heat or cold.

One part of the AirVisual Pro which can benefit from maintenance is the PM2.5 sensor. It is the nature of all laser (light-scattering) PM2.5 sensors that after a prolonged period of exposure to pollutants, the sensor's readings may experience some degree of drift. The extent of this will vary depending how much pollution the sensor is exposed to.

This 'drift' is likely to happen more quickly in high-pollution environments, for example in cities with generally high outdoor pollution levels (e.g. US AQI frequently above 150). Additionally, whether the device is indoors or outdoors has an impact, since indoor environments generally have approximately 20% lower pollution levels than outdoors, even without any indoor filtration.

If you are using the Pro in an indoor environment, in a place with generally low outdoor pollution levels (e.g. US AQI<50), then the sensor may not benefit from replacement/recalibration for a number of years, in any of these sensor modes.

If you are using the Pro in an outdoor, high pollution environment (AQI frequently > 150), then the sensor may benefit from recalibration/replacement after approximately 12-18 months.

These are guidelines - the best way to tell if your sensor is experiencing any drift, is to compare its readings with another AirVisual Pro's PM2.5 sensor, which is relatively new.

Default sensor mode takes measurements approximately 12x less frequently than Continuous sensor mode - so Continuous mode should expose the sensor to 12x more pollution over time, which may impact the rate of drift.

Without recalibration, the PM2.5 sensor will continue to depict valid trends of higher and lower pollution levels, although it may lose a degree of precision over time. Users concerned with maintaining topmost accuracy in the long-term may want to recalibrate their PM2.5 sensor every so often.

We offer a recalibration service. Currently, this requires your Node/Pro to be posted to one of our service centers. We currently have service centers in the following locations, although we are constantly expanding this list. Contact AirVisual if you don’t see a service center near to you, and we will ensure you can get your Node/Pro recalibrated.

China: contact China support

North America: contact North America support

Europe: contact Europe support

India: contact India support 

The AirVisual Pro/Node

  1. How can I make my outdoor Node/Pro's data public?
  2. Chinese users: AirVisual Node/Pro常见问题
  3. AirVisual Node/Pro software updates - Changelog
  4. Download the AirVisual Node/Pro's data using Samba
  5. How to access the AirVisual Node/Pro's API
  6. How to connect the Node/Pro to Wi-Fi?
  7. Why does my Wi-Fi disconnect frequently?
  8. How can I access the PM10 measurements from my Node/Pro?
  9. Connecting the Node/Pro to Wi-Fi networks with web authentication (captive portal)
  10. How can I update my Node/Pro’s software?
  11. How often does the Node/Pro's sensor take measurements? What is the difference between "Continuous" and "Default" mode?
  12. Why is my AirVisual Node/Pro showing higher pollution than outdoors?
  13. How can I see the PM2.5 concentation in µg/m3 on my AirVisual Node/Pro?
  14. My serial number does not exist
  15. How can I rename my AirVisual Node/Pro?
  16. How can I reset my AirVisual Node/Pro?
  17. What is pairing mode and how does it work?
  18. Can I use my AirVisual Node/Pro where there is no outdoor data?
  19. I want to register my AirVisual Node/Pro
  20. Node/Pro maintenance and sensor recalibration
  21. Payment options, shipping and warranty
  22. What's the difference between the Node/Pro's Enterprise and regular account?
  23. What is IFTTT and how can I use it with my AirVisual Pro?
  24. How can I get the most of my AirVisual Node/Pro's battery?
  25. Return Policy
  26. How do I display PM2.5 AQI and CO2 on the same screen?
  27. My Node/Pro shows a different measurement than the official outdoor station
  28. My Node/Pro shows 'No recent data' for Outdoor air quality
  29. Will my Node/Pro work without Wi-Fi?
  30. How do the PM2.5 sensor and CO2 sensor work?
  31. How does the AirVisual Node/Pro predict (forecast) future air quality?
  32. What temperature range can the AirVisual Node/Pro can function within?
  33. What is the size of the AirVisual Node/Pro's screen?
  34. What is included in the AirVisual Pro box?
  35. What is the area coverage that the reading of Node/Pro is valid for?
  36. AirVisual Pro Battery Information
  37. How can I view PM2.5 concentrations on the Node/Pro?
  38. Where can I find my AirVisual Pro’s serial number?
  39. What do each of the buttons on the AirVisual Pro do?
  40. AirVisual Pro Dimensions & Weight
  41. Why does the AirVisual Node/Pro monitor PM2.5 and CO2?
  42. What is a "Share Code" and where can I find it?
  43. How do I view my Node/Pro’s data on the AirVisual website and app?
  44. Does the Pro/Node have an indoor & outdoor sensor?
  45. Will there be a VOC Pro/Node soon?
  46. Battery stays at 0% when charging and turns off when unplugged
  47. Cannot register my monitor's serial number
  48. How to change or unfollow an outdoor station on my Pro?
  49. AirVisual Pro API returned JSON format
  50. Why is the Node/Pro's screen reading different to what is shown on the app?
  51. My PM2.5 sensor has got 'stuck' on a very high number
  52. Can the Pro's screen be switched off permanently, while still taking measurements?
  53. My device has stopped displaying outdoor data
  54. Samba data download troubleshooting
  55. How can I connect my AirVisual Pro to other home devices with IFTTT, without a premade Applet?
  56. Edit your air quality data's timestamp in Excel after downloading
  57. How to deregister/unlink my AirVisual device
  58. My CO2 sensor seems to have lost accuracy

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