Tds Meter
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![]() In line Dual TDS Meter after before RO DI monitor US $18.50 |
![]() TDS Meter PPM Tester for RO DI water filters reef US $9.90 |
![]() TDS Meter Tests Water Quality Total Dissolved Solids US $24.59 |
![]() TDS METER PEN US $29.95 |
![]() Waterproof TDS Aquarium Pool Water Quality Tester Meter US $34.19 |
![]() Digital TDS Meter for Testing Water Quality Most Accurate for Reverse Osmosis RO US $37.53 |
![]() HM Digital TDS4 Pocket Meter TDS 4 Tester with Solution US $21.00 |
![]() Dual In Line TDS Meter for RO DI Reverse Osmosis Tap US $34.99 |
![]() TDS 3 TDS Digital Meter tester 0 9990ppm 1000 Hour NIB US $15.99 |
![]() Pocket TDS Mini Meter US $29.99 |
![]() Milwaukee SE600 Replacement Probe Sensor for MW801 MW802 pH EC TDS Meters US $69.97 |
![]() HANDHELD TDS METER 3 TM US $22.96 |
![]() TDS METER RO DI HM DIGITAL HAND HELD COM 100 TDS TEMP US $59.95 |
![]() REVERSE OSMOSIS DI TDS METER CALIBRATION SOLUTION US $12.99 |
![]() HM Digital Handheld TDS Meter w Thermometer US $24.99 |
![]() HM Digital Pocket Sized TDS Meter w Thermometer US $24.99 |
![]() HM Digital Waterproof EC TDS Temp Combo Meter US $59.99 |
![]() Milwaukee MA850 pH EC TDS Probe for SM801Meter MA 850 US $67.75 |
![]() HM Digital In line Dual TDS Meter US $28.49 |
![]() HM DIGITAL TDS 4 METERS PPM TESTER Hydro US $21.00 |

Why does my Filtered water have higher TDS than tap water?
I just installed a DuPont under sink water filter. It's a single stage with a carbon block filter and it came with its own faucet. Per the instructions I ran 5 gallons of water through the filter before using. I purchased a TDS meter and tested the water straight from the tap it was reading 120 and from the filter its was reading 155. I re-calibrated the meter and the results were similar. I returned the meter thinking its defective. New meter same thing. Returned the second meter and purchased a different brand for more money. Same results. Ran another 10 gal trough the filter no change. Tap reads between107 - 120 and filtered reads 140-155. Does this make sense?
You can try sending a e-mail to DuPont but there customer service stinks and you'll probably never get a response. You might also try soaking the filter cartage in water over night. Chances are with a new setup you just need to run it far a wile before it breaks in. Give it 1 week and check it again.
How to take a TDS meter reading















































