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Water Testing

Water Testing

Easy To Use Do-it-Yourself Water TDS Meters & Water Test Kits
  1. Regular Price: $29.99

    Special Price $19.99

    As low as: $11.99
    PR-2-KIT Precipitator 2 Repair Kit - Includes 4 replacement iron rods, two aluminum rods and two fuses. If you have the old style PR-2 Precipitator with the WaterFiltersOnline.com Logo and the switch in the center order the first rod and fuse kit. If you have the new style PR-2 Precipitator without the WaterFiltersOnline.com Logo and the switch on the side order the second rod and fuse kit. Learn More
  2. Regular Price: $49.99

    Special Price $37.99

    As low as: $17.99
    TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed - The lower the TDS level in the water, the more efficiently your body's cells actually get hydrated by the water that you drink. The higher the TDS levels in the water, the greater the probability of harmful contaminants that can pose health risks or hinder the absorption of water molecules on the cellular level. Simple to use for Reverse Osmosis membrane monitoring. We really like this tester and think that anyone who wants to know about the quality of their water should have one of these TDS Meter Testers to monitor their RO membrane. Learn More
  3. Regular Price: $59.99

    Special Price $39.99

    As low as: $24.99
    TDS-3 Handheld Pure Water Testing Meter For Total Dissolved Solids With Carrying Case. HM Digital. Features Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient and accurate due to its advanced microprocessor technology. Hold Function: saves measurements for convenient reading and recording. Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries. Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. Built-in digital thermometer Display: large and easy-to-read LCD screen. Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. TDS Range: 0 - 9990 ppm (mg/L) Temp. Range: 0 - 80 degrees Celsius Resolution: 1 ppm, 1 degree Celsius (also available in 10 ppm) Accuracy: +/- 2% ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit) Power source: 2 x 1.5V button cell batteries (included) Battery life: 1000 hours of usage Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches) Weight with case: 76.5g (2.7 oz) Weight without case: 56.7g (2 oz) Learn More
  4. Regular Price: $76.95

    Special Price $59.99

    As low as: $47.99
    FOR THE PROFESSIONAL ! ------ COMBO METER / TESTER FOR EC / TDS / TEMP - WATERPROOF. The only handheld TDS meter / EC meter with full scale digital calibration. A water tester that is perfect for both consumer or commercial use. Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. Learn More
  5. Regular Price: $49.99

    Special Price $39.99

    As low as: $19.99
    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! Learn More
  6. Regular Price: $69.99

    Special Price $49.99

    As low as: $29.99
    TDS Meter Dual Mode Readings - Professional Grade - Easily Installs Inline - Very Simple To Use. Measure the tap water coming in vs. the purified water going out of your system at any time. Use the meter to determine when the filters need to be changed. Highly efficient and accurate due to its advanced microprocessor technology. Displays TDS levels of the Feed Water and Product Water with in & out electrode probes. Auto-Off function conserves battery power. The unit shuts off automatically after 20 seconds. Dual Range - Measures from 0-999 ppm, with a resolution of 1 ppm. Learn More
  7. Regular Price: $119.99

    Special Price $84.99

    As low as: $69.99
    Incredibly accurate! A pH tester that is perfect for both consumer or commercial use. Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more. Measures pH and Temperature. Auto-ranging three point calibration with digital fine tuning Includes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up. Waterproof housing. Simultaneous temperature display. Measurement Range: 0-14 pH. Digital Calibration (push button). Auto-off function, data-hold function and low-battery indicator. Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated: The PH-200 meter is three-point factory calibrated to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver. Includes a cap, batteries, and lanyard. pH Range: 0 - 14 Temperature Range: 0-80 °C; 32-176 °F Resolution: 0.01 pH; Temperature resolution is 0.1 °C/F Accuracy: +/- .02% Calibration: Digital calibration by push button. Electrode: Replaceable glass sensor and reference tube electrodes Housing: Waterproof (submersible; floats) Power source: 3 x 1.5V button cell batteries (included) Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches) Weight without case: 96.4 g (3.4 oz) .

    SP-P2 Preplacement Sensors

    Ph Meter Buffer Solution

    Ph Meter Storage Solution

    Learn More
  8. Regular Price: $59.99

    Special Price $45.99

    As low as: $39.99
    HM Digital SP-P2 Replacement Sensor for PH-200 PH Meter Learn More
  9. Regular Price: $8.99

    Special Price $4.99

    As low as: $2.99
    Hanna ® TDS Calibration Solution 1382 PPM for calibrating TDS Meters / Testers to use for testing Reverse Osmosis RO Systems. # 70032 Learn More
  10. Regular Price: $19.99

    Special Price $13.99

    As low as: $10.99
    HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life. Variety pack of pH buffer solution. Simple to use. Powder has an indefinite shelf life. Total volume: 1.2 liters. Each powder packet makes 100 ml of solution (when mixed with distilled or deionized water) Contents: 3 packets of 4.0 pH, 6 packets of 7.0 pH, 3 packets of 10.01 pH Extra: Includes one empty 100 ml bottle Accuracy: +/- 0.02 pH at 25 degrees Celsius Preparation directions included with the pack. Learn More
  11. Regular Price: $23.99

    Special Price $13.99

    As low as: $11.99
    Hanna ® pH 7.01 Buffer Solution HI7007M used to calibrate meters. Hanna pH buffers are made of Potassium Dihydrogen Phosphate and Disodium Hydrogen Phosphate and are standardized with a pH meter that is calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S.R.M.). 230 ml bottle. Learn More
  12. Regular Price: $24.99

    Special Price $13.99

    As low as: $11.99
    Hanna ® HI70300M Storage Solution For pH & Orp Electrodes. 230 ml bottle. Hanna storage solutions are prepared with high grade Potassium Chloride and Potassium Hydrogen Phthalate by titration with NIST 2201 standardized Silver Nitrate and NIST 84j standardized Sodium Hydroxide Solution, respectively. Learn More
  13. Regular Price: $22.99

    Special Price $14.99

    As low as: $9.99
    7 in 1 Home Water Test Kit - Kit includes complete tests for the following: Chlorides Total Hardness Total Iron Total Chlorine Free Chlorine pH Total Alkalinity Learn More
  14. Regular Price: $27.99

    Special Price $19.99

    As low as: $15.99
    Pesticide Water Tests - Individual Home Pesticide Water Tests - Use with ease in your own home. Test for Pesticide in Your Water. Find out what level of water quality is coming into your house. Very simple use and very fast results. Learn More
  15. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    Chlorine Water Tests - Bottle Of 50 Individual Tests. Quick Results. Use with ease in your own home. Find out what level of chlorine is coming into your house. Very simple use and very fast results. Learn More
  16. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    Hardness Water Tests - Bottle Of 50 Individual Home Tests - Quick Results. Use with ease in your own home. Test for hadr water. Find out what level of hardness is coming into your house. Monitor water softener performance. Be sure your settings are correct for premium soft water. Very simple use and very fast results. Learn More
  17. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    Nitrate & Nitrite Water Tests - Bottle Of 50 Individual Home Tests - Quick Results. Use with ease in your own home. Test for pesticides and more. Find out what level of water quality is coming into your house. Very simple use and very fast results. Learn More
  18. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    PH Water Tests - Bottle Of 50 Individual Home Tests - Quick Results. Use with ease in your own home. Find out what level of water quality is coming into your house. Very simple use and very fast results. Learn More
  19. Regular Price: $22.99

    Special Price $9.99

    Iron Water Test Strips With Test Tablets (20 tests) - Quick Results. Use with ease in your own home. Test for iron in your water. Find out what level of water quality is coming into your house. Very simple use and very fast results. Learn More
  20. Regular Price: $34.99

    Special Price $24.99

    As low as: $19.99
    Water Test - School Project Kit Water Tests - Individual Water Test - School Project Kit Water Tests - Very simple use and very fast results. Fast & Easy - Easy to use. Do it yourself in the class room. 8 different tests allow students to analyze 5 seperate water supplies. Ease and accuracy prompts parents, students and educators to explore water quality in science classes and school fairs. Tests include Nitrates/Nitrites, pH/Alkalinity/Hardness, Chlorine, Copper, Iron. Great class project. Order 1 test kit per 5 students. Learn More
  21. Regular Price: $22.99

    Special Price $15.99

    As low as: $12.99
    2 Pool And Spa Bacteria Tests Per Package. Easy to use. Do it yourself. Results in 20 minutes. Test for harmful bacteria for safety. Learn More
  22. Regular Price: $59.99

    Special Price $39.99

    As low as: $19.99

    Discontinued - No Longer Available

    Precipitator 1 Digital PR-1 ® - With Case - Easy to Use - Use the Precipitator as an effective visual demonstration for displaying the differences between a customer's tap water and purified water. Tap water will turn a blackish-green within seconds and look undrinkable. FEATURES: The Precipitator 1 is an effective sales tool that visually demonstrates the difference between high TDS water and low TDS water after using it to perform a test on the water sample. Electrode rods display the degree of TDS present in the water sample through an electro-chemical reaction. Easy to set the testing time with an operating timer. Operating status lights display usage for both the tap water and the purified water. Encased in highly durable impact-resistant plastic. Folding electrode rods make the unit very easy to carry and manage. Comes in a convenient vinyl carrying case. SPECIFICATIONS Max. operating TDS: 500 PPM Timer range: 0 - 15 minutes Power source: AC 110V & AC 220V with adaptor plug included. Dimensions: 12.5 x 6 x 5.5 cm (5 x 2.3 x 2 in.) Unit Weight: 442.3 g (15.6 oz) Total Weight: 601 g (1 lb 5.2 oz) Be sure to order extra rods and fuses. Don't let a demonstration go bad because you needed the service kit. Optional service kit includes 4 iron rods, 2 aluminum rods and 2 fuses. Learn More
  23. Regular Price: $39.99

    Special Price $24.49

    As low as: $12.99
    Precipitator 2 Digital PR-2 ® - Compact Model Easy to Use - Use the Precipitator 2 as an effective visual demonstration for displaying the differences between a customer's tap water and purified water. Tap water will turn a blackish-green within seconds and look undrinkable. FEATURES A smaller, scaled-down version of the Precipitator 1, both effective sales tools for water filtration professionals. Electrode rods display the degree of TDS present in the water sample through an electro-chemical reaction. Encased in highly durable impact-resistant plastic. Removable electrode rods make the unit very easy to carry and manage. Compact, flat pocket-size design. SPECIFICATIONS Max. operating TDS: 500 ppm Power source: AC 110V / AC 220V Adaptor plug for 220V not included. Dimensions: 10.2 x 9.9 x 2.4 cm (4 x 3.9 x 1 in.) Unit Weight: 178.6 g (6.3 oz.) Total Weight: 207 g (7.3 oz.) Be sure to order extra rods and fuses. Don't let a demonstration go bad because you needed the service kit. Optional service kit includes 4 iron rods, 2 aluminum rods and 2 fuses. Learn More
  24. Regular Price: $29.99

    Special Price $19.99

    As low as: $9.99
    Precipitator Replacement Rods and Fuses Repair Kit includes 4 iron rods, 2 aluminum rods and 2 fuses. Don't let a demo fail because you didn't have the repair parts on hand. Be sure to order at least one kit with your new Precipitator. Also fits the old HM Digital PR-1 precipitators. Learn More

Be sure to check our Parts Department for important parts such as TDS Testers, Replacement Tanks, O-rings,Housing Wrenches and more parts for your reverse osmosis pure water system.