2 ms·
So the two purpleair devices are using PM1003 and PM5003 sensors, respectively. These are available off the shelf as well. I suppose the salient question is: do
by formerly_proven 5y ago
So the two purpleair devices are using PM1003 and PM5003 sensors, respectively. These are available off the shelf as well. I suppose the salient question is: does purpleair calibrate / select these themselves or add anything to them (e.g. filter), or can you just use a PMS5003 for 30 bucks and get similar results?
- genewitch 5y agoAfaik you can use the $30 module and be within acceptable tolerances, but you really should have at least a temperature and humidity sensor as well, because as that changes the other sensors will report differently. I've noticed that even being exposed to pure carbon dioxide the sensors I have will increase the counts of CO, VOC, and HCHO, which is unlikely and a false read. I only care about CO2 for my devices, so my two $30 sensor based devices are fine.