4 ms·
Most of the DIY solutions I’ve seen use pre-packaged PM sensors, which are probably the same parts embedded in over the counter solutions.
by ashtonkem 5y ago
Most of the DIY solutions I’ve seen use pre-packaged PM sensors, which are probably the same parts embedded in over the counter solutions.
- danans 5y agoYes, but has the final assembly been calibrated against a known controlled environment? Without that, the readings from the device become more of a crapshoot, which is fine if there is no desire for greater precision (i.e a just for fun project) Sensor manufacturers cannot calibrate for every possible packaging configuration. As someone who has DIYed a lot of stuff related to indoor climate, I tend to save my effort for the mitigation work, and use well tested measurement tools to validate those. This is for the same reason that one doesn't usually DIY a multimeter before doing electrical work.
- ashtonkem 5y agoThe PM sensor I’m thinking of comes in it’s own packaging with a fan, and is usually attached to a PCB alone. I don’t see how most applications of it would require a recalibration.