TDS Meter ???
- Thread starter meowzer
- Start date
florida joe
Well-Known Member
Some people accept higher values, but if all the different components of the RO/DI were working up to full capacity, your number should be zero.
only if your ro unit filters out one hundred percent of dts which they do not
only if your ro unit filters out one hundred percent of dts which they do not
cranberry
Active Member
Originally Posted by florida joe
http:///forum/post/2970501
only if your ro unit filters out one hundred percent of dts which they do not
If you use a DI it should filter out everything.
http:///forum/post/2970501
only if your ro unit filters out one hundred percent of dts which they do not
If you use a DI it should filter out everything.
meowzer
Moderator
Originally Posted by florida joe
http:///forum/post/2970501
only if your ro unit filters out one hundred percent of dts which they do not
Sooo 2 is okay then
http:///forum/post/2970501
only if your ro unit filters out one hundred percent of dts which they do not
Sooo 2 is okay then
florida joe
Well-Known Member
Originally Posted by Cranberry
http:///forum/post/2970506
If you use a DI it should filter out everything.
with out giving a link i would like to see some info on a ro/di unit that filters out 100 percent
http:///forum/post/2970506
If you use a DI it should filter out everything.
with out giving a link i would like to see some info on a ro/di unit that filters out 100 percent
cranberry
Active Member
Originally Posted by florida joe
http:///forum/post/2970522
with out giving a link i would like to see some info on a ro/di unit that filters out 100 percent
Hold up... I have to reinstall IE.
http:///forum/post/2970522
with out giving a link i would like to see some info on a ro/di unit that filters out 100 percent
Hold up... I have to reinstall IE.
cranberry
Active Member
Okay, I guess it'snot IE but my internet connection... hopefully it won't kick me out.
The rejection rating is the membrane rating, the reverse osmosis aspect, not the final output TDS rating. Measuring just the RO output before it hits the DI aspect tells you how your membrane is functioning. If my membrane is rated for 95% and my product water is 5 out of a tap reading of 100 TDS, then it's within it's promised/expected range. You put a DI on that puppy and your TDS should be zero. That's why it's okay to drink RO verses it not being okay to drink RO/DI. RO/DI water has nothing in it... it's pH is neutral.
Mine is ALWAYS zero. When I see it hit 1 that's when I start gathering up my supplies to change the prefilters and DI.
Meowzer, I can't look that filter up ATM... for some reason this is the only site I can get into
The rejection rating is the membrane rating, the reverse osmosis aspect, not the final output TDS rating. Measuring just the RO output before it hits the DI aspect tells you how your membrane is functioning. If my membrane is rated for 95% and my product water is 5 out of a tap reading of 100 TDS, then it's within it's promised/expected range. You put a DI on that puppy and your TDS should be zero. That's why it's okay to drink RO verses it not being okay to drink RO/DI. RO/DI water has nothing in it... it's pH is neutral.
Mine is ALWAYS zero. When I see it hit 1 that's when I start gathering up my supplies to change the prefilters and DI.
Meowzer, I can't look that filter up ATM... for some reason this is the only site I can get into
florida joe
Well-Known Member
what brand of RO/DI unti are you planning to buy
florida joe
Well-Known Member
With all due respect I submit the following information sheet from a high end $500. 4-stage RO/DI unit.
ImpurityLevelRemoved ImpurityLevelRemoved
Sodium Fluoride99%Copper Sulfate>99%
Sodium Cyanide97%Formaldehyde35%
Sodium Chloride99%Methanol25%
Silica98%Ethanol70%
Sodium Bicarbonate99%Isopropanol90%
Sodium Nitrate97%Urea70%
Magnesium Chloride99%Lactic Acid94-99%
Calcium Chloride99%Glucose98%
Magnesium Sulfate>99%Sucrose99%
Nickel Sulfate>99%ChlorinatedPesticides (traces)>99%
Also in reference to RO/DI filtered water I am Quoting Delbeek and Sprung. “Contrary to popular belief that it should be neutral, reverse osmosis/ deionized water often has an acidic PH between 5 and 7 due to the presence of excess dissolved CO2"
I also believe the unit you posted a pic of that you have now is a purifier and NOT a RO unit
ImpurityLevelRemoved ImpurityLevelRemoved
Sodium Fluoride99%Copper Sulfate>99%
Sodium Cyanide97%Formaldehyde35%
Sodium Chloride99%Methanol25%
Silica98%Ethanol70%
Sodium Bicarbonate99%Isopropanol90%
Sodium Nitrate97%Urea70%
Magnesium Chloride99%Lactic Acid94-99%
Calcium Chloride99%Glucose98%
Magnesium Sulfate>99%Sucrose99%
Nickel Sulfate>99%ChlorinatedPesticides (traces)>99%
Also in reference to RO/DI filtered water I am Quoting Delbeek and Sprung. “Contrary to popular belief that it should be neutral, reverse osmosis/ deionized water often has an acidic PH between 5 and 7 due to the presence of excess dissolved CO2"
I also believe the unit you posted a pic of that you have now is a purifier and NOT a RO unit
locoyo386
Member
Tap Water Filter
Purifies tap water through adsorption, oxidation, and an ion exchange process. Removes heavy metals, sediments, chlorine, chloramines, chemicals and nonorganic ions. Results in perfect water, for freshwater, saltwater, African cichlid or community aquariums. Attaches to any faucet. Treats an average of 50-150 gallons before needing refill cartridge. Refill cartridge simply screws in to unit.
Purifies tap water through adsorption, oxidation, and an ion exchange process. Removes heavy metals, sediments, chlorine, chloramines, chemicals and nonorganic ions. Results in perfect water, for freshwater, saltwater, African cichlid or community aquariums. Attaches to any faucet. Treats an average of 50-150 gallons before needing refill cartridge. Refill cartridge simply screws in to unit.
cranberry
Active Member
Originally Posted by florida joe
http:///forum/post/2970753
With all due respect I submit the following information sheet from a high end $500. 4-stage RO/DI unit.
ImpurityLevelRemoved ImpurityLevelRemoved
Sodium Fluoride99%Copper Sulfate>99%
Sodium Cyanide97%Formaldehyde35%
Sodium Chloride99%Methanol25%
Silica98%Ethanol70%
Sodium Bicarbonate99%Isopropanol90%
Sodium Nitrate97%Urea70%
Magnesium Chloride99%Lactic Acid94-99%
Calcium Chloride99%Glucose98%
Magnesium Sulfate>99%Sucrose99%
Nickel Sulfate>99%ChlorinatedPesticides (traces)>99%
Also in reference to RO/DI filtered water I am Quoting Delbeek and Sprung. “Contrary to popular belief that it should be neutral, reverse osmosis/ deionized water often has an acidic PH between 5 and 7 due to the presence of excess dissolved CO2"
I also believe the unit you posted a pic of that you have now is a purifier and NOT a RO unit
Okay, maybe I shouldn't have said it filters out 100%, but should have reworded to say "your TDS meter should read 0 TDS... as mine does." The end TDS is what we are actually discussing not the miniscle numbers found through lab testing. I can't argue that... but that's not we are discussing... we are discussing hobbyist testable TDS through means of a quality meter. I use inline because if your bucket has any reminients in it, your test results may not be accurate.
Yes, CO2 will supress the pH. This will climb up in time to 7 if you bubble the water..... the water itself is neutral if you remove the artifically high CO2 levels.
I can also quote peeps who say 0 TDS should occur with RO/DI.... but where's the fun in that.
http:///forum/post/2970753
With all due respect I submit the following information sheet from a high end $500. 4-stage RO/DI unit.
ImpurityLevelRemoved ImpurityLevelRemoved
Sodium Fluoride99%Copper Sulfate>99%
Sodium Cyanide97%Formaldehyde35%
Sodium Chloride99%Methanol25%
Silica98%Ethanol70%
Sodium Bicarbonate99%Isopropanol90%
Sodium Nitrate97%Urea70%
Magnesium Chloride99%Lactic Acid94-99%
Calcium Chloride99%Glucose98%
Magnesium Sulfate>99%Sucrose99%
Nickel Sulfate>99%ChlorinatedPesticides (traces)>99%
Also in reference to RO/DI filtered water I am Quoting Delbeek and Sprung. “Contrary to popular belief that it should be neutral, reverse osmosis/ deionized water often has an acidic PH between 5 and 7 due to the presence of excess dissolved CO2"
I also believe the unit you posted a pic of that you have now is a purifier and NOT a RO unit
Okay, maybe I shouldn't have said it filters out 100%, but should have reworded to say "your TDS meter should read 0 TDS... as mine does." The end TDS is what we are actually discussing not the miniscle numbers found through lab testing. I can't argue that... but that's not we are discussing... we are discussing hobbyist testable TDS through means of a quality meter. I use inline because if your bucket has any reminients in it, your test results may not be accurate.
Yes, CO2 will supress the pH. This will climb up in time to 7 if you bubble the water..... the water itself is neutral if you remove the artifically high CO2 levels.
I can also quote peeps who say 0 TDS should occur with RO/DI.... but where's the fun in that.
