I am interested in measuring a range of parameters, including temperature, humidity, PM 2.5, PM 10, CO2, O3, SO2, and NO2, with an air quality monitoring system. However, I have been experiencing difficulties in sourcing good quality sensors for this purpose. After some research, I have identified the following sensors that may be suitable:
Temperature [C] and Humidity [% or gm3]:
SHT30 Temperature And Humidity Sensor - Wired Enclosed Shell
PM 2.5 [µg/m3]:
PM2.5 Air Quality Sensor and Breadboard Adapter Kit - PMS5003
I would appreciate your professional opinion on these sensors as I am planning to connect them to an Arduino. and suggest some alternative options for the sensors and provide links to purchase them? Additionally, I would appreciate it if you could suggest some compact sensor options that would be suitable for my project.
I can tell you one thing for sure; you are taking a chance when buying electronics from Amazon.
Those products may be several years old and have sat in some un-airconditioned warehouse exposed to extreme hot and cold temperature.
Also don't buy from a website if they don't provide a data sheet for the particular sensor or IC used.
The response from @Jim-p regarding 'consumer distribution' warehouses is appropriate for further consideration: the vendors that contract with Amazon generally are non-manufacturer authorized dealers.
Also consider that many consumer-priced sensors require the end-user to perform some calibration and the results must be placed in the software code. This makes manufacturing multiple units very awkward as the code must change and be recompiled and uploaded to the uC for each specific sensor.
The eBay/Amazon sensors are good workbench parts that can be used for testing concepts, reusing them from project to project. Once you reach the prototype stage, you should be using quality sensors from an authorized distributor, IMO.