[PSUBS-MAILIST] scrubber performance

[via Personal_Submersibles]

I have had good performance from this company but with their K30 sensor.  $85 and does give 0-5v analog output signal.  It span is 0-10,000 ppm (0-2%).

Cliff

Sent from my iPad

> On Feb 2, 2017, at 2:37 PM, River Dolfi via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> I did side-by-side tests on several low-cost ambient CO2 sensors when I was doing air quality instrumentation work, and I eventually settled on these units from COZIR. 
> http://www.co2meter.com/products/cozir-0-2-co2-sensor
> 
> They're only about $70US, have built in self calibration, super reliable, and have very low current draw compared to other sensors. The big rub is that it isn't analog output, but serial.
> 
> You would have to interface it with a microcontroller (which is an easy enough job with a $20 Arduino) and have it set up to display to an LCD, trip an alarm at critical levels, possible demand control of the scrubber, other sensors, etc.
> 
> I have an identical system built for the health department currently running 70 (70!!!) of these sensors and others on battery power across the city in the elements. They are that good.
> 
> I recently found about half of a medical scrubber in a dumpster, so I've been thinking about life support lately.
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