Quote:
Originally Posted by Myka
Brad, why do you like inline TDS meters better? Do you sell one that can be calibrated by the consumer?
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Hi Myka
As of yet, I don't think we stock any TDS meters. That said, they kind of go hand in hand with RO units, so perhaps we should.
I own two dual stage inline TDS meters. Both can be calibrated, but i have never done so. Personally, I'm not as interested in an accurate reading as
I am about a change from a known baseline parameter.
If my tap water is 100ppm or 200ppm, I don't really care. It is interesting to see if in the spring with the snow melt and run off the TDS increases, but it's not an important reading to me.
I am interested in the TDS between the RO and DI as well as the TDS between the DI and the Resevoir. These measurements tell me when to replace my membrane and when to replace my resin. With an inline monitor, I can see the effect of flushing the membrane in real-time and I can time how long it takes to reach peak performance.
For example, I know that it takes almost 5 minutes of flushing to bring the TDS down below 10ppm after the RO membrane, so I have a solenoid that flushes for 5 minutes once a day when the unit comes on.
I'm also not too concerned about whether my TDS is 0ppm or 1ppm as long as it doesn't start shifting too much. I know the calibration is reasonably accurate because when I change the DI resin the monitor reads 0ppm.
For my application, these sensors really must be inline to be effective.
- Brad