Fishy Business

Monitored TDS Meter?

tygunn

tygunn

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Has anyone heard of a monitored TDS meter? Ie something you could plug into ethernet or hook up to a controller?

I have a couple inline dual TDS monitors on my RO/DI system, but I'm horrible at checking them to see how the filters are doing. Yeah I know I'm lazy, but I figure this should be something easily automated.
 
I bet that some of the salinity monitors would work.
TDS is just conductivity.
The reef-angel one is likely programmable.
But the range could be different.
 
Hmm it's a shame there isn't something like my simple inline TDS monitor that I could just connect to a computer. I like that the little TDS probes are just inline with the unit.

I hadn't though of the unit running. Will have to think this idea through.

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Does your RO/DI run all the time? If, like most, it doesn't there is always a spike in TDS upon startup (RO output). Monitoring would have to compensate for this.

The other reading I monitor is system pressure. As the first two filters start to plug the pressure goes down. This really effects the ratio of product to waste.

For me pressure and TDS are simple to monitor every time I use the unit. I would not want to go to the expense of automating. It's all about developing the routine or habit of checking. Like putting socks on BEFORE shoes! :) :)
 
I fill my ATO bin every 3 weeks or so. I don't evaporate much so 5g of water lasts a long time. Otherwise it runs a couple times a day to fill up the pressure tank as we use RO for drinking water.

When I set up my RO/DI system I was monitoring pressure pre and post filters, but as soon as I added the RO booster pump that became futile. The booster pump causes the pressure to fluctuate as it runs so the pressure reading is meaningless. It also causes the gauge to make a loud ticking sound. So I ended up removing them. :)

My thought is that a simple flow meter in combination with TDS readings would be adequate data to keep track of the performance of my RO system. I could easily filter the initial TDS spike out in software.

Monitoring total water used would also be useful so I know when to change the catalytic carbon and two carbon blocks.
 
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