Measuring oxygen in water

[Archiver]

Hello,

IS there an inexpensive device that will measure
oxygen level in water? Of course I would like to
output the signal to the BS2.

Thanks,

Todd

__________________________________________________
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[Archiver]

isn't there 2 hydrogen molecules per 1 oxygen molecule ? or does water have
an extra amount oxygen ?

richard


----- Original Message -----
From: "Todd Botner" <contacttodd@y...>
To: <basicstamps@egroups.com>
Sent: Tuesday, December 19, 2000 10:10 AM
Subject: [basicstamps] Measuring oxygen in water


> Hello,
>
> IS there an inexpensive device that will measure
> oxygen level in water? Of course I would like to
> output the signal to the BS2.
>
> Thanks,
>
> Todd
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Shopping - Thousands of Stores. Millions of Products.
> http://shopping.yahoo.com/
>
>
>
>

[Archiver]

It is similar to a fishtank. You can aerate the water. Pure water is
almost never found. There are always minerals and other "stuff" dissolved
in the water that allows it to hold more oxygen.

Eric

-----Original Message-----
From: dakota [mailto:rfriedrich@i...]
Sent: Tuesday, December 19, 2000 10:39 AM
To: basicstamps@egroups.com
Subject: Re: [basicstamps] Measuring oxygen in water


isn't there 2 hydrogen molecules per 1 oxygen molecule ? or does water have
an extra amount oxygen ?

richard


----- Original Message -----
From: "Todd Botner" <contacttodd@y...>
To: <basicstamps@egroups.com>
Sent: Tuesday, December 19, 2000 10:10 AM
Subject: [basicstamps] Measuring oxygen in water


> Hello,
>
> IS there an inexpensive device that will measure
> oxygen level in water? Of course I would like to
> output the signal to the BS2.
>
> Thanks,
>
> Todd
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Shopping - Thousands of Stores. Millions of Products.
> http://shopping.yahoo.com/
>
>
>
>

[Archiver]

He's probably looking for a measure of the amount of oxygen dissolved in
water.

Read about it:
Technical Dissolved Oxygen - The Fundamentals
http://www.omega.com/techref/ph-1.html

Sensors: (maybe not "inexpensive", and there are sure to be others around)
http://www.omega.com/toc_asp/section...=FF&book=Green
Maybe you could do something with the probe alone if you want to condition
your own signal.

Perhaps something could be done with the oxygen sensor from an automobile?

Daniel

-----Original Message-----
From: dakota [mailto:rfriedrich@i...]
Sent: Tuesday, December 19, 2000 11:39 AM
To: basicstamps@egroups.com
Subject: Re: [basicstamps] Measuring oxygen in water


isn't there 2 hydrogen molecules per 1 oxygen molecule ? or does water have
an extra amount oxygen ?

richard


----- Original Message -----
From: "Todd Botner" <contacttodd@y...>
To: <basicstamps@egroups.com>
Sent: Tuesday, December 19, 2000 10:10 AM
Subject: [basicstamps] Measuring oxygen in water


> Hello,
>
> IS there an inexpensive device that will measure
> oxygen level in water? Of course I would like to
> output the signal to the BS2.
>
> Thanks,
>
> Todd
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Shopping - Thousands of Stores. Millions of Products.
> http://shopping.yahoo.com/
>
>
>
>

[Archiver]

At 08:10 AM Tuesday 12/19/2000 -0800, you wrote:
>Hello,
>
>IS there an inexpensive device that will measure
>oxygen level in water? Of course I would like to
>output the signal to the BS2.

My guess would be that dissolved oxygen sensors aren't inexpensive.
Sensors are available, but some general information might be wise,
before purchasing anything.

Rosemont Analytical has a general information sheet here:

[ http://www.rauniloc.com/pdf/ads/general/43-003.pdf ]

which you may want to read before you proceed. Generally, sensors are attached
to a purchased unit which prepares the signal for use. Often the output of
these sensors is 4-20 ma. which would need to be interfaced to the Stamp.

Rosemont Analytical's on line web presence is via their Uniloc Division
which can be found here : [ http://www.rauniloc.com/ ]. The dissolved
oxygen sensors can be found here:
[
http://www.rauniloc.com/1-800-854-82...Page=01&Cat=03 ].

Hope that gets you started.

>Thanks,

>Sure

>Todd

Regards,

Bruce Bates

[Archiver]

>Hello,
>
>IS there an inexpensive device that will measure
>oxygen level in water? Of course I would like to
>output the signal to the BS2.
>
>Thanks,
>
>Todd
>
>_________________________________________________ _
>Do You Yahoo!?
>Yahoo! Shopping - Thousands of Stores. Millions of Products.
>http://shopping.yahoo.com/

I don't know of anything that would qualify as "inexpensive".
Instrumentation is like that. For classroom or hobby use about the
cheapest will be around $200 from Vernier:
http://www.vernier.com/probes/do.html

There are meters in the $500 and up range that consist of both a
sensor and a microprocessor/display, but no convenient interface to
an external logger. E.g.,
http://www.ysi.com/ysi/envweb.nsf

And there are >$500 DO transmitters meant for long-term deployment in
process or environmental apps, e.g.,
http://www.oxyguard.dk/

Tracy Allen
electronically monitored ecosystems
http://www.emesystems.com

[Archiver]

Todd,
Another good information source is Omega Engineering.
http://www.omega.com/techref/ph-1.html for the explaination.

http://www.omega.com/ppt/pptsc.asp?ref=PHDG70 for the probe and
instrumentation.
http://www.omega.com/ppt/pptsc.asp?refOB343 for the less expensive one.
As mentioned by others, none of it is cheap.

Mike



At 08:10 AM 12/19/2000 -0800, you wrote:
>Hello,
>
>IS there an inexpensive device that will measure
>oxygen level in water? Of course I would like to
>output the signal to the BS2.
>
>Thanks,
>
>Todd
>
>_________________________________________________ _
>Do You Yahoo!?
>Yahoo! Shopping - Thousands of Stores. Millions of Products.
>http://shopping.yahoo.com/

_________________________________
Mike Walsh
walsh@i...
California Institute of Technology
Biology Electronics Shop
MS 216-76
Pasadena, CA 91125

626-395-6825 , FAX 626-584-1654
237 Beckman Behavioral Biology Bldg.

[Archiver]

Of Course,
just measure the amount of hydrogen, then divide by two...

(Sorry, I just couldn't resist...)

At 10:38 AM 12/19/2000 -0600, you wrote:
>isn't there 2 hydrogen molecules per 1 oxygen molecule ? or does water have
>an extra amount oxygen ?
>
>richard
>
>
>----- Original Message -----
>From: "Todd Botner" <contacttodd@y...>
>To: <basicstamps@egroups.com>
>Sent: Tuesday, December 19, 2000 10:10 AM
>Subject: [basicstamps] Measuring oxygen in water
>
>
>> Hello,
>>
>> IS there an inexpensive device that will measure
>> oxygen level in water? Of course I would like to
>> output the signal to the BS2.
>>
>> Thanks,
>>
>> Todd
>>
>> __________________________________________________
>> Do You Yahoo!?
>> Yahoo! Shopping - Thousands of Stores. Millions of Products.
>> http://shopping.yahoo.com/
>>
>>
>>
>>
>
>
>
>
>
>

[Archiver]

This oxygen sensor from Vernier is very widely used is schools across
the US and Canada. Biology/Ecology classes find it extremely easy to
use when plugged into the Texas Instruments cbl (calculator based
labs) unit.

Vernier is a VERY user friendly company and provides the info
necessary for interfacing ALL of their sensors to various data
acquisition devices. They carry sensors for magnetic field, force
(strain gauges), colorimetry, temperature, light level, acceleration,
distance and just about anything else a high school science class
could dream up.

It may not be as cheap or as satisfying as hacking something together
'on your own', but when you are ready to buy something 'off the
shelf' with a proven track record, give 'em a call.

This isn't an ad - but I've been pleased with Dave and
Christine Vernier's interfacing projects since they started in their
garage with the Apple II !!!


At 10:09 AM -0800 12/19/00, Tracy Allen, you wrote about Re:
[basicstamps] Measuring oxygen in water:
>
> >IS there an inexpensive device that will measure
> >oxygen level in water? Of course I would like to
> >output the signal to the BS2.
> >
>I don't know of anything that would qualify as "inexpensive".
>Instrumentation is like that. For classroom or hobby use about the
>cheapest will be around $200 from Vernier:
> http://www.vernier.com/probes/do.html

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