It has been quite some time now since I have had 2 devices with VOC sensors and I want to express my honest opinion about them. I am not going to talk about the brands but only I will discuss my opinion if the VOC sensor have a value to the user.
One of devices displays the measurments in ppb and the other one displays an index value from 1 to 5. At the beginning I was thinking that ppb is a better way to display pollution inside the house “more accurate” but after a while I understood that it doesn’t matter because index values are a greater and easier way for the avarage users to understand that.
VOC sensors measure a variety of harmful chemical compounds with carbon atoms (aka organic) like Acetone CH3(CO)CH3, Benzene C6H6, Ethylene glycol C2H6O, Formaldehyde CH2O, Toluene C7H8,Xylene C8H10, etc… but also other non harmful VOCs as well, for instant when I clean my house I use distilled water and organic essential oil, tea tree to be more exact. Tea tree’s components are Terpinen-4-ol C10H18O, γ-Terpinene C10H16, Aromadendrene C15H24 etc… all with Carbon atoms which they trigger the VOC sensor. As you can understand if you don’t have the chemical knowledge for each particle in the air, you might get confused by the alerts your VOC sensor gives you.
Many users have told me that they indeed feel confused by the readings the VOC sensor gives them. The researchers on the other hand say that at least you know the concentration of some organic gas is higher than normal, and you can start thinking about why that occurs.
I am not in favor of researchers’ opinion, the user has to know excaly what isn’t going well with his air quality and not guessing.
Interesting DIY projects for Weather-Air devices. Sure there are many Brand devices out there that measure air pollution or weather conditions but prices can get high, so if you have the skills to solder then you can design a device for your own needs. There are a lot of DIY projects out there, so choose the best for you and your wallet.
1. Easy IoT weather station with multiple sensors by Ingenerare