Re: [PSUBS-MAILIST] Life Support Revisited

["Cliff Redus" <dr_redus@devtex.net>]

Alec/Phil,

Based on some research I did 6 months ago, here is one more CO2 sensor to
consider that would interface with a PLC. Range is 0-2000 ppm, with input
voltage of 18-38 VDC (600 mA)  and output of 0-5VDC, 0-10VDC or 4-20mA(
jumper selectable). This price on this at
http://www.worldsensors.com/products/index.cfm?region=2 is $390 for the base
unit. See this site for more info on the unit.


Cliff


----- Original Message -----
From: "Alec Smyth" <Asmyth@changepoint.com>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, August 06, 2003 8:35 AM
Subject: RE: [PSUBS-MAILIST] Life Support Revisited


> Phil,
>
> 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 -- and the 9GS
> for up to 25% CO2 typically for industrial incubators and food storage
> and processing."
>
> This would lead me to think 4GS is it. However, I also found the
> standard 4GS has 0-10V output, while the standard 9GS has 0-5V output.
> So my initial selection of the 4GS model conflicts with your remark that
> it has 0-5V output. D'you know which of these two it might be? You might
> also be using a 4GS with custom output.
>
> http://www.ti.com/snc/products/sensors/gas-4gs.htm
>
> http://www.ti.com/snc/products/sensors/gas-9gs.htm
>
>
> thanks!
>
> Alec
>
>
> -----Original Message-----
> From: Phil Nuytten [mailto:72020.572@compuserve.com]
> Sent: Wednesday, August 06, 2003 1:11 AM
> To: INTERNET:personal_submersibles@psubs.org
> Subject: RE: [PSUBS-MAILIST] Life Support Revisited
>
> Hi, Alec!
>         The CO2 sensor you want is made by Texas Instruments . .
> operates
> at 0-5V . . .costs about 500 bucks, sensor only. You can route it
> directly
> to the PLC - Check out TI's on-line catalog and if you can't find the
> unit
> you want, get back to me and I'll get the part number from one of the
> techs.
> Phil Nuytten