Aeroqual’s portable air quality monitors are very useful for both indoor and outdoor air quality monitoring with high accuracy and reliability.

https://www.aeroqual.com/indoor-air-quality-monitors/portable-monitors

https://www.aeroqual.com/outdoor-air-quality/outdoor-portable-air-monitors

Grimm has few devices of choice.

For indoor air, there is the small portable multi-sensor unit made by Air Advice for Homes: http://www.airadviceforhomes.com/contractors/airadvice-for-homes/how-it-works/

Air Advice also has a large database of residential indoor-air recordings by contractors, that has never been explored as a data source.

Air Advice used to have a division for industrial indoor-air analysis, but I can't find it on their website now.

YES Plus LGA 15-Channel IAQ Monitor

https://www.critical-environment.com/products/indoor-air-quality-monitors/yes-plus-lga

From my expertise, it depends a lot on which air pollutants do you want to monitor, and in which conditions (if you want to monitor continuously or not; if you want active or passive sampling; if it has to be power autonomous or it can be plugged while operating;...).

For continuous active sampling, besides Aeroqual (suggested by Arideep Mukherjee) which I also recommend, there are other brands with good equipment, but allow me to suggest two more: (1) TSI has a good variety of options for both indoor and ambient air quality monitoring, especially for PM (https://www.tsi.com/home/); and (2) Environmental Devices Corporation (http://environmentaldevices.com/).

Check their websites for more specifications.

1. MiniVol™ TAS Applications

2. Ecotech

3. Aeroqual’s portable air quality monitors

We did a comprehensive research on indoor air quality monitoring devices and we finally selected one called uHoo, as it monitors 9 different parameters and you can log the data and store it in the cloud.

Thank you Ms. Monica.

Can you advise that which equipment had you used for comprehensive research on indoor air quality monitoring devices.