[Waterluvian]

I'm looking around for an affordable household CO2 measurement tool but they're all wildly expensive. Is this technology complicated and cannot be obtained for $30? They're all like $120+

Edit: I realised that this is a perfect item for public libraries to loan out. Expensive, only needed occasionally, easy to use, potential for significant positive public impact on becoming more informed and healthier.

If you're looking for a cause that's affordable, practical, and local, consider buying and donating one to your local library.

[gsich]

MH-Z14 or Z19. But this is just the sensor, you'll need an Arduino/ESP/Rpi too.

[AYBABTME]

What's particular about these sensors? I've been researching technologies to monitor plant growth and haven't yet looked into CO2 sensors, hence my asking. Do they come in an IC package?

[gsich]

They use optical measurement, are reasonable in pricing. Outputs are UART, PWM and analoge.

They have pins with 2.54mm spacing if that helps you.

[AYBABTME]

Would you use something else if you meant to solder something on a PCB for medium scale production?

[gsich]

Don't know. There are chemical sensor with a heating element, but those usually suck.