I was curious about the levels of CO2 in my room so I went and bought a sensor for my bedroom. I was somewhat appalled when I woke up this morning with heavy eyelids to see the concentration at 1700 ppm.
Guess I have to leave my door open now.
I was curious about the levels of CO2 in my room so I went and bought a sensor for my bedroom. I was somewhat appalled when I woke up this morning with heavy eyelids to see the concentration at 1700 ppm.
Guess I have to leave my door open now.
Yeah it’s on the website linked from the blog post.
Indoor kit is $230USD or $138 for the DIY.
Outdoor kit is $225 or $125.
No, I don’t know why the outdoor kit is cheaper than the indoor one 🤷
The components look like they’d cost closer to $60 USD, but you’d need to print a PCB and create an enclosure.
My biggest question, for both the DIY and make it from scratch versions, is since they don’t get tested like the prebuilt, how do you know it’s measuring accurately?
The sensors are preassembled, so I assume the result would be the same. If there’s variation in the enclosure that changes the airflow, then yeah, that could cause differences.
Presumably some percent fail the test but most pass. How do you know if you’ve got a dud?
I have owned enough electronics to know the percentage of duds is higher than you’d hope 😅