News for hackers. Stuff that matters.

A comment on Show HN: I wanted to measure CO2 in my office, so I build a C++ WebServer/App. Parent comment

Re:Show HN: I wanted to measure CO2 in my office, so I build... by Hobohodo on Friday January 25, 2019 @08:56AM (#18997852)
Would you be able to share where you might get such a cheap CO2 sensor/the name of it? I've had trouble finding them for less than £60 in the UK and would like to set one up.
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by gsich on Friday January 25, 2019 @10:01AM (#18998462)
MH-Z14 or Z19 are cheap, but not 8$ cheap, more like 25.
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by sbr464 on Friday January 25, 2019 @12:44PM (#19000332)
https://www.co2meter.com/collections/sensors has a bunch of different ones, I usually look on Mouser also. I don't have a name of one currently. I've been using the particle.io platform with a particle device/LTE for sending out data and programming them.
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by gsich on Friday January 25, 2019 @05:04PM (#19002982)
None of them are in the 8$ range. There also seem to some copies which are way overpriced.
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by sbr464 on Monday January 28, 2019 @01:26AM (#19015630)
Interesting to have an arbitrary $8 price point. You only live once, get the best!
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by gsich on Monday January 28, 2019 @01:43AM (#19015687)
Not my restriction.
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by bhouston on Friday January 25, 2019 @01:22PM (#19000723)
I always check aliexpress.com https://www.aliexpress.com/wholesale?SearchText=co2+sensor+m...
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by RossM on Friday January 25, 2019 @09:13AM (#18997968)
Adafruit sell a 1-60,000 ppm equivalent-CO2 sensor for £15. https://www.adafruit.com/product/3709
[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by aaaaaaaaaab on Friday January 25, 2019 @09:26AM (#18998083)
This doesn't measure CO2 levels. It measures volatile organic compounds and calculates the amount of CO2 that would cause the same greenhouse effect.

>The SGP30 does have built in calibration capabilities, note that eCO2 is calculated based on H2 concentration, it is not a 'true' CO2 sensor for laboratory use.

[ Parent | on HN ]
Re:Show HN: I wanted to measure CO2 in my office, so I build... by janekm on Friday January 25, 2019 @01:49PM (#19001048)
Not even that. It is designed for hvac applications and measures VOCs on the assumption that they are from human breath and have a corresponding increase in CO2 levels due to breath.
[ Parent | on HN ]