Re: [DIYbio] Building an incubator, would like some opinions/help

> hydrogen looks cheap and easy at $7.95 (the L.A. biohackers were
> trying to grow some extremophile in hydrogen I think)
> https://www.sparkfun.com/products/10916
>
> ahh but it looks like it isn't temperature compensated, though it
> includes a heater on-sensor
> http://wiki.biohackers.la/Nitrogenase_Directed_Evolution#Bioreactor_Setup

Yeah, that was me. Do yourself a favor and avoid the $10 H2 and CO2
sensors. For H2 I was using that one from sparkfun and for CO2 I was
using http://tinyurl.com/b6ckxao They are completely worthless. They
only work well at constant temperature and humidity. And each
individual sensor has to be calibrated separately. I wasted a couple
of months trying to calibrate those things at different temperatures
and humidity levels :/

I eventually gave up trying to measure H2 and CO2, but I imagine any
NDIR sensor (like the one from co2meter.com) will work much better.
They cost more but you will save a lot of time, effort, and gray
hairs.

-cory

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