Dissolved Oxygen

Dissolved Oxygen (DO) probes are availabe in two different types. The first type is polarographic and the second is galvanic. The difference between the two is that polarographic puts out a small current and galvanic puts out a small voltage. Since we've already developed circuits to measure small voltages (BNC Sensor Shield) we can use it and adapt it to DO's characteristics (namely it only produces 40mv at full saturation).

Resources:

http://www.nico2000.net/datasheets/electrodes.html#do

http://www.nico2000.net/datasheets/Sentek-DO-Op.pdf

http://en.wikipedia.org/wiki/Oxygen_sensor#Electrodes

http://www.finesse.com/files/pdfs/app-tech-notes/Finesse.TruDO.primer.ApNote.pdf

http://www.ysi.com/parametersdetail.php?Dissolved-Oxygen-1=

Comments

DO sensors

Can you use a sensor from Atlas Scientific? (http://atlas-scientific.com/product_pages/sensors/do-sensor.html) The mg/l is almost a direct conversion to PPM in the needed 12 to 14.5 PPM consentration needed for raising fish.

To be honest, I'm not

To be honest, I'm not entirely sure. I'm a little bit leary of products that don't provide datasheets. We can definitely try it and see how it goes. We're going to try and support as many different probes as possible so we can always try :-)

Practical Maker

Comments

DO sensors

To be honest, I'm not

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