3 ms·
Are you sure you have a CO2 monitor and not an eCO2 monitor? A lot of cheaper CO2 sensors really detect VOCs and try to estimate CO2 from that.
by alach11 3y ago
Are you sure you have a CO2 monitor and not an eCO2 monitor?
A lot of cheaper CO2 sensors really detect VOCs and try to estimate CO2 from that.
- jrockway 3y agoI have this: https://www.airthings.com/view-plus https://www.airthings.com/view-plus It ain't cheap.
- dallyo 3y agoWell price is no guarantee. Try the hand sanitiser test I detailed above.
- tmoertel 3y agoThe CO2 sensor in the View Plus id advertised as follows: NDIR Sensor (Non-Dispersive Infra-Red): Measurement range 400–5000 ppm Optimum Accuracy ±50ppm ±3% within 10 – 35°C / 50 - 95°F and 0 – 80%RH after initial calibration time Can you tell from that description whether it's a true CO2 sensor?
- dallyo 3y agoThat's proper CO2 sensor then. The cheap ones are estimating CO2 levels from VOC levels.
- dallyo 3y agoSecond this. It's possible that the 3000 reading is triggered by something else. They should try rubbing sanitiser on their hands and then holding the device - if it goes crazy then it's not directly sensing CO2.
- jrockway 3y agoI sort of did this test last night. I assume that VOCs include ethanol, so I mixed up some drinks near the monitor. VOCs went from ~60ppb to a peak of 579ppb. CO2 remained constant at about 640ppm. I am less surprised than other people that making an open fire indoors increases CO2 levels. Where do the combustion byproducts go if not into the air.