Other water quality sensors

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Mytilus

Other water quality sensors

Postby Mytilus » Sun Nov 21, 2010 11:57 pm

Hi I just purchased a pH electrode and adaptor from Phidgets and I'm really happy with them. I would like to monitor other common water quality variables such as dissolved oxygen and conductivity. I noticed that the Chinese manifacturer of the pH probe also makes these probes. Is Phidgets considering selling these types of sensors (hopefully with adaptors) in the future? I'm pretty sure that there would be a market with the hobby brewers, aquarium and hydrophobic folks.
Regards-John

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Re: Other water quality sensors

Postby in10ceguy » Sun May 29, 2011 8:22 pm

I have used this conductivity sensor that provides 0-5vdc for 1018 adapter.
http://webpages.charter.net/tdsmeter/conductivity.html

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Re: Other water quality sensors

Postby almo1010 » Sun Sep 18, 2011 5:45 pm

in10ceguy wrote:I have used this conductivity sensor that provides 0-5vdc for 1018 adapter.
http://webpages.charter.net/tdsmeter/conductivity.html


I am in the process of setting up several of these also.
But I think I'm having impedance mis-match.

I can't get the resolution to match a 3rd party sensor.
Did you use a resistor across the sense lines?

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Re: Other water quality sensors

Postby almo1010 » Wed Sep 21, 2011 10:21 pm

Well, worked that out. A bug in the code, a pilot error or 2.

Yep, working just fine and the little trim pot makes it perfect.
As simple a solution as can be.

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Re: Other water quality sensors

Postby in10ceguy » Fri Sep 23, 2011 9:28 pm

you are right about the impedance mis-match. I notice when connecting the sensor to Arduino in this case , voltage drops about 50mv, however with the calibration trimpot it can be compensated and will not effect on linearity.

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Re: Other water quality sensors

Postby kris » Mon Jun 25, 2012 7:01 am

Hi !
I am also looking for a conductivity sensor to interface with my 1018 (8/8/8).
Could you specify the exact model you used from http://webpages.charter.net/tdsmeter/conductivity.html ?

Maybe you could also provide a cabling scheme to the 1018 ?

And finally, is the Phidhets pH/ORP Adapter required ?

Best regards

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Re: Other water quality sensors

Postby in10ceguy » Sun Sep 09, 2012 5:05 pm

Yes
Model A1002 for inline applications which already has the built in electrode.
Model A1003 if you have your own ec probe . Both work fine

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Re: Other water quality sensors

Postby gbv » Mon Jun 24, 2013 8:25 am

This post interests me and I'm new to phidgets. So, I don't understand if I need an pH/ORP adapter to get an EC sensor.

I made a try, connecting an EC sensor to the adapter and it isn't consistent. I'm using a calibration solution 10,5uS and I get a 2093 value in phidget. So it isn't the good adapter.

My questions are simple:

Is there a phidget adapter available for EC sensor?
If not, is the following model A1003 from http://webpages.charter.net/tdsmeter/products.html appropriate?
If so, how do you connect it on the phidget? Directly or through an other adapter?

Many thanks for giving us a clear understanding :)

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Re: Other water quality sensors

Postby mparadis » Mon Jun 24, 2013 10:05 am

Since that sensor has a 0-5V output, you can connect it directly to an analog input on an InterfaceKit. However, since this sensor requires a 12V power supply, you'll either need to provide an external power supply or use the 1144 - 5V to 12V Sensor Adapter to convert the 5V power of the analog input to 12V for the sensor.

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Re: Other water quality sensors

Postby gbv » Mon Jun 24, 2013 10:07 am

Perfect, an answer clear and easy to understand even for a newbie!


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