Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

LOW PRICES and FAST SHIPPING SINCE 1999 !

99.5% Of All Items In Stock For Same Day Shipping!

TDS Meter Inline Tester- Dual Mode Reading - Easily Installs Inline - Very Simple To Use

$49.99 Special Price $39.99
  • Buy 2 for $34.99 each and save 13%
  • Buy 3 for $32.99 each and save 18%
  • Buy 10 for $24.99 each and save 38%
  • Buy 50 for $21.99 each and save 45%
  • Buy 100 for $19.99 each and save 50%
In stock
TDS Meter - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Always know if your RO membrane is performing correctly!
DM1 TDS Water Meter - Dual Mode - Installs Inline - HM Digital DM1 - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. Simply cut the line out from the RO membrane housing and install the inline probe between the membrane housing and the shutoff valve, when possible. The closer to the membrane housing the better. Insert the ends of the tube into the John Guest quick connectors on the TDS meter probe. Then cut the inlet feed water line to the system and install the other T/probe. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.) Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Cable Length: 24.5" (including sensor) Power source: 2 x 1.5V button cell batteries (included) Battery life: over 1000 hours of continuous use Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.) Weight: 79.4 g (2.8 oz.) Always know if your RO membrane is performing correctly!

Related Categories

Aqua FX Water Filters ®

Aquapure Apcrf pc77-apc78

Aqua Pure AP-RP5500

3M Purification - Aqua-Pure Water Filters ®

Aquariums Water Filters ®

Aqua Systems Water Filters ®

Aquatec Addons

Atlantic Filter Water Filters ®

Avian Water Filters ®

3M Purification - Water Factory Systems Water Filters ®

AICRO Kemflo Water Filters ®

American Plumber Water Filters ®

Ametek Water Filters ®

Aqua Cleer Good Water Machine Water Filters ®

AquaGenics Water Filters ®

Big Blue Water Filters ®

Challenger Water Filters ®

Coleman Only Water ® - Water Filters

Coralife Pure-Flo II Water Filters ®

Culligan RO Reverse Osmosis Water Filters

DI Deionization Water Filters

DuPage Water Filters ®

DuPure International Water Filters ®

Essential Water & Air Water Filters ®

Farris Enterprises Water Filters ®

Culligan Faucet Filters Water Filters ®

Filmtec Dow Reverse Osmosis Residential Membranes ®

Filmtec Dow Commercial Reverse Osmosis Membranes ®

Flint & Walling Water Filters

Flowmatic Water Filters ®

GE Merlin Water Filters ®

Harmsco Water Filters ®

Iron Well Water Filters

Kenmore Water Filters ®

Kent Marine Water Filters ®

Kinetico Water Filters ®

Maytag Water Filters ®

Nimbus Water Filters ®

NorthStar Water Filters ®

Omni OMNIFILTER Water Filters ®

Omnipure "Q" Series Water Filters ®

Paragon Water Filters ®

Premier Water Filters ®

PureGen Water Filters ®

RainSoft Water Filters ®

Reo Pure Water Filters ®

Standard Style Replacement Water Filters

TGI Pure Water Filters ®

Vertex Water Filters ®

WaterFiltersOnline.com RO Systems Water Filters ®

Water General Water Filters ®

Water Safe Water Filters ®

Whirlpool Water Filters ®

Samsung, Maytag, CUNO, Aqua-Pure ® replacement water filter cartridges

Maytag, Amana, Jenn-Air UKF8001AXX PuriClean II Refrigerator Water Filter - Replaces WF50

Maytag, Amana WF401 #12527304 Refrigerator Water Filter

WRO-3167 Reverse Osmosis System

RO-3000 American Plumber

RO-3500 American Plumber

Ametek RO-2300 Reverse Osmosis RO System

Ametek & American Plumber RO-2127 Reverse Osmosis RO System

Ametek, Kleen Plus SY-5197, Culligan Filtration System

Kleen Plus HYDRO-10AG and WSRO10C Reverse Osmosis System

Kleen Plus HYDRO-WSRO20-T Reverse Osmosis System

Kleen Plus CCU-1 System With PPTCU Replacement Kit

Ametek CCF-201 Chemical Contaminant Removal Filter

Ametek CCF-301 Chemical Contaminant Removal Water Filter System

CTR-210 Countertop Water Filter System

Pentek Sediment Pre Filters

Pentek Sediment Pre Filters

Ametek, Pentek, US Filter, Plymouth, Culligan, American Plumber and Kleen Plus Carbon Water Filters For Reverse Osmosis RO & Filtration Systems

Pentek Sediment Pre Filters 20" X 2 1/2" (See All)

Ametek Carbon 20

Ametek Refrigerator

Pentek Quick Change Filters

Ametek Specialty

Big Blue Carbon Filters

Big Blue 20" X 4 1/2" Sediment Filters

Drain Saddles

Sears 34700 RO System

Sears Kenmore UltraFilter 34703 RO System

Sears Kenmore 625.347001, UltraFilter 100 625.384700

Sears Kenmore ® 625.347120

GE GSWF Refrigerator Water Filter

GE PNRV 12 & GXRV 10 Series SmartWater Filters

Farris ROS3

Farris ROS4

Farris ROS4-3

Farris ROS5

Farris Economy RO System

Farris ROSL 2312 Farris ROSL 2312

Farris ROSL 3312

Farris ROSL 4312

DuPure & Rayne 3 Stage RO Reverse Osmosis Systems

DuPure or Rayne Reverse Osmosis System Upgrade To 4 Stage RO System

PJD ® 3000 3 Stage CTA System CTA Reverse Osmosis Membrane

PJD ® 4000 4 Stage TFC System TFC Reverse Osmosis Membrane with inline GAC Post Filter

PJD ® 5000 5 Stage TFC System TFC Reverse Osmosis Membrane with inline GAC Post Filter

Whirlpool, KitchenAid & Sears Kenmore 4396508 Refrigerator Filter

Whirlpool WSR4134Y uses SQC Water Factory Filters 47-55702G2, 47-55704G2, 66-4706G2 & 47-55710G2

Cullgan AC-15 Aqua Cleer Good Water Machine RO System

Culligan AC-30 Aqua Cleer Good Water Machine RO System

Culligan AC-50 Aqua Cleer Good Water Machine RO System

Culligan Water Tower ® CWT-35

Culligan H-5 Aqua Cleer Good Water Machine RO System

Culligan H-53 Aqua Cleer Good Water Machine RO System

Culligan H-8 Aqua Cleer Good Water Machine RO System

Culligan H-82 & H-83 Aqua Cleer Good Water Machine RO System

Lancaster CRO-212 Reverse Osmosis Replacement Water Filters

Lancaster CRO-312 Reverse Osmosis System Water Filters

RainSoft ® 9338 Reverse Osmosis System Water Filters

RainSoft ® 9590 & 9593 Reverse Osmosis System Water Filters

RainSoft ® 9591 Reverse Osmosis System Water Filters

RainSoft ® 9596 Reverse Osmosis System Water Filters

RainSoft ® 9598 Reverse Osmosis System Water Filters

RainSoft ® Ultrefiner UF10 RO System & 21173 Water Filters

RainSoft ® Ultrefiner UF22, UF22T, 21176 & UF50, UF50T & 21179, 21191 Water Filters

Boat & RV Water Filters

OMNIFILTER BF7a Whole House Filter System

OMNIFILTER U700 Filtration System

OMNIFILTER RO2000 Reverse Osmosis System

Kleen Plus HYDRO-10AG and WSRO10C Reverse Osmosis System

Kleen Plus HYDRO-WSRO20-T Reverse Osmosis System

Kleen Plus CCU-1 System With PPTCU Replacement Kit

Pentek Carbon Filters 20" X 2 3/4"

Culligan ® SY-1000 System # 158568

Culligan ® SY-2000 System # 160213

Culligan ® HF-150 Water Filter Housing # 151197 Replacement Water Filters

Culligan ® HF-950 Water Filter Housing #151196 Replacement Water Filters

Culligan ® US-550 & US-560 #158401 Replacement Water Filters

Culligan ® US-600 #158405 Replacement Water Filters

Culligan ® US-640 #158510 Replacement Water Filters

Tanks

Learn to increase the GPD capacity size of your reverse osmosis membrane

Flow Restrictors

Water Testing

Reverse Osmosis Explanation And Contaminant Removal Chart

Water Filters Housings POE (point of entry) Whole House

TDS Meters - Total Dissolved Solids

TDS water quality tester

Bruner V15 Reverse Osmosis Water Filters

Challenger Conqueror 3 Stage

Challenger Conqueror II and Gladiator II Compatible

Coleman Only Water 500 WP30-1000 Water Filters

Coleman Only Water 525 WP30-2000 Water Filters

Dupage RO TS3C 10

Dupage RO TS3 24

Dupage RO-TS4T-24

Everpure ROM Reverse Osmosis Replacement Water Filter Cartridges

Everpure Recharges

Filter Direct RO-316

GE GXRM10GBL RO Replacement Water Filters

Kinetico 518 Water Filters

Kinetico 520,521 Water Filters

Kinetico RO Membrane Replacement

Kiss Aristocrat 3000 Standard-1

Kiss Duke Duchess Water Filters TFC

Kiss Aristocrat 5000 cta

Kiss Aristocrat 5000 tfc

Kiss Duke Duchess Water Filters cta

Nimbus Water Filter CS-2

Nimbus Water Filter CS-3

Nimbus Water Filters Standard 4stg

Paragon - P1000 RP

Precipitators for water testing and demonstrations

PureGen Reverse Osmosis System

PureGen ERO-100P High Flow Reverse Osmosis

Puregen Water Filters Ero 316

PureGen ERO-435 and RO4-35 Reverse Osmosis System

Puregen Water Filters Ero 535

REOPURE-EC-Jaco

Spring Soft Water Filters

TGI Topway Global Win 445 Water Filters

Water Safe tfc 25

TGI-315 - 3 Stage Reverse Osmosis Systems

TGI-315TFC - 3 Stage Reverse Osmosis Systems

TGI-325E - 3 Stage Reverse Osmosis Systems

TGI-415 - 4 Stage Reverse Osmosis System

TGI-525 & TGI-525P - 5 Stage Reverse Osmosis Systems

TGI-625U, TGI-625UP & TGI-625UP/DX - 6 Stage Reverse Osmosis Systems

3 Stage CTA Reverse Osmosis RO Drinking Water System Help

3 Stage TFC Reverse Osmosis RO Pure Drinking Water System Help

4 Stage TFC Inline Reverse Osmosis RO Pure Water System Help

4 Stage TFC No Inline Reverse Osmosis RO Pure Drinking Water System Help

5 Stage TFC Reverse Osmosis RO Pure Drinking Water System Help

Delta Fresh US-1 Water Filters

Delta Fresh US-3 Water Filters

Delta Fresh US-2 Water-filters

Water Factory N5000-TFC 3M CUNO Reverse Osmosis System

Water Factory System 5000 Reverse Osmosis Water Filters

Pentek Water Filters ®

Pentek RO-2300 Reverse Osmosis RO System

Pentek & American Plumber RO-2127 Reverse Osmosis RO System

Pentek, Kleen Plus, Culligan SY-5167 Filtration System

Pentek, Kleen Plus SY-5197, Culligan Filtration System

Pentek CCF-201 Chemical Contaminant Removal Water Filter System

Pentek CCF-301 Chemical Contaminant Removal Water Filter System

CTR-210 Countertop Water Filter System

Pentek, Pentek, US Filter, Plymouth, Culligan, American Plumber and Kleen Plus Carbon Water Filters For Reverse Osmosis RO & Filtration Systems

Pentek Carbon 20

Pentek Refrigerator

Pentek Specialty

Pentek & American Plumber RO-2127 Reverse Osmosis RO System

Pentek, Kleen Plus, Culligan SY-5167 Filtration System

Lancaster CRO-212 Reverse Osmosis System Replacement Water Filters & Reverse Osmosis RO Membrane

Lancaster CRO-312 Reverse Osmosis System Water Filters

Nature's Way Backpack Water Filters

Raine "Q" Series Water Filters ®

RO/Conn Water Filters ®

GE Pro Elite RO-450

ECO WATER ERO-350

Campbell RO Water Filters ®

PuroTwist PT4000 Water Filters

MCS Super Twist Water Filters ®

PuroTwist PT3000 Water Filters

Water Factory N5000-TFC 3M CUNO Reverse Osmosis System

Water Factory System 5000 Reverse Osmosis Water Filters

WaterFiltersOnline.com RO Systems Water Filters ®

WaterFiltersOnline.com 4 Stage Reverse Osmosis RO System Water Filters

WaterFiltersOnline.com RO Systems Water Filters ®

WaterFiltersOnline.com RO Systems Water Filters ®

Ametek & American Plumber RO-2127 Reverse Osmosis RO System

Ametek & American Plumber RO-2127 Reverse Osmosis RO System

Ametek & American Plumber RO-2127 Reverse Osmosis RO System

Kleen Plus, Kleen Plus SY-5197, Culligan Filtration System

Aquadepot AD-TFC-50-5 Reverse Osmosis Replacement Water Filters

Conqueror Water Filters ®