RE: [PSUBS-MAILIST] Life Support Revisited/CO2 monitor

[William Alford <walford@dbtech.net>]

At 09:35 AM 8/6/2003 -0400, you wrote:

>On TI's catalog I found the following:
>"Sensors & Controls gas sensors are presently comprised of two families
>of CO2 sensors: The 4GS -- typically in indoor air quality applications
>for measuring concentrations up to 5000 parts per million 

take at look at these. I obtained one of these for evaluation but haven't
tested it out yet--
http://www.dcs-inc.net/m305.htm, around $165 I think.

the linear measurement output is available as an analog voltage or a
pulse-width modulated digital signal. Analog output is 0.1-3v and range is to
2000ppm CO2 with resolution of 10ppm and accuracy +/- 5%. I believe it may be
available in 5K ppm as well.

William Alford