> I once saw a sensor chip that claimed to measure both CO2 and TVOC (total volatile organic compounds). After finding some further documents on the part I disc

> I once saw a sensor chip that claimed to measure both CO2 and TVOC (total volatile organic compounds). After finding some further documents on the part I discovered it was a total scam. It only actually measured one of those things, then it used this measurement to look up an expected value of the other in a table the manufacturer made based off “common indoor measurements”. I remember similar thing with some UVC sensors, they just returned expected UVC based on UVA level