[693471]

You are not going to get an accurate CO2 sensor for $27. You're being misled into buying cheap Chinese crap.

An accurate CO2 sensor is much more expensive. I would not trust the readings of the sensor in this blog. It's going to be off by over 100ppm, especially if there's a lack of good airflow.

https://www.atlas-scientific.com/product_pages/probes/ezo-co...

[joshefin]

Senseair is a Swedish company and definitely not "cheap Chinese crap". Do you know about any research that confirms your statements about the accuracy?

I believe that some of the more expensive sensors are more accurate, but this cheap one may be a good enough solution in some cases (e.g. indoor air monitoring for DIY projects).

[693471]

The research has been done by the weed growing community. I don't know any professional growers using sensors outside of the American Scientific as the cheap ones are inaccurate and failure prone.

[emergie]

Oh god, I have never seen a datasheet like this https://www.atlas-scientific.com/_files/_datasheets/_probe/E...

[Isamu]

Is that a favorable response?

It seems thoughtfully designed. I especially like the warnings in the beginning. Usually I prefer a higher density of information, but this is not too shabby.

[emergie]

Well it has most of the data, but the form is a bit unappealing.

For comparision - this is a datasheet of a temperature sensor device: http://pdf.datasheetcatalog.com/datasheet/maxim/DS18B20.pdf

Electrical characteristics, operation principles, state machines and so on, and it is suitable for printing.

EZO-CO2(tm) datasheet looks crazy.

page 3 is a big poster warning about submerging of the sensor

page 4 is a big poster warning about bright light interference

page 5 is a big poster warning about ground loops

1/3 of page 10 is a cartoon picture of a production line.