Fine! What would it take to build a sensor based on this physics http://www.habmigern2003.info/future_trends/infrared_analyser/ndir/IR-Absorption-GB.html ?
One IR-LED and maybe 4 photo diodes, or a prism combined with a linear CCD? Some slow ADCs in a cheap MCU. It seems possible to do this for far less than $259 - the price of a sensor. David On Thu, Mar 7, 2013 at 12:50 PM, Andre Blum <[email protected]> wrote: > I am certainly no expert in this area, but the specs call it NDIR and > there is a wikipedia page on that topic: > http://en.wikipedia.org/wiki/Nondispersive_infrared_sensor > > Andre > > > On 03/07/2013 07:34 AM, David Jonsson wrote: > > Hi > > How does a infrared gas meter like this one work? > > http://www.co2meter.com/collections/co2-sensors/products/sprintir-100-percent-co2-sensor > > David > > David Jonsson, Sweden, +46703000370 > > >
