Debra Medina Autoclave Sterilizer

Tds Meter

Benifits Of Using Reverse Osmosis in a Reef Aquarium

Whether using tap or well Water you are certain to run into something that your aquatic inhabitants are not going to appreciate including Metals,  Phosphates, Nitrates, Chlorine and Chloramines (in some locations).  Tap water may work for a while however you can never be certain you are not going have a disaster with your next water change.

You could also pick up water at your local water store however this is just RO water and typically has a TDS (Total Dissolved Solid) count of 2-10 depending on when the filters were changed.  Total Dissolved Solids (often abbreviated TDS) is a measure of the combined content of all inorganic and organic substances (like Red Slime) contained in a liquid in molecular, ionized or micro-granular suspended form.   This is great for drinking water and much better than tap water but still not the best for your reef tank.  You need the DI component to get your TDS down to zero.  Once at zero you can be fairly certain you are not contributing anything bad to your tank like the items mentioned above.  You are preventing nuisance algae and bacteria's that can cause a complete tank shutdown and when you look at the cost of all of your fish and corals it is approximately two hundred dollars or less well spent!

Get yourself a good 4-5 Stage RODI Unit, we sell them on our site for under $200 Canadian.  As far as maintenance goes you only need to change your cartridges about every 6 months although it is recommended to change the sediment filter every 2-3 months or when it appears dirty.  This will help extend the life of your reverse osmosis membrane.  The membrane is what squeezes out most of the bad stuff in the water and usually lasts about 2-5 years depending on the source waters starting TDS and carbon dioxide content.  I have sold, used and recommended Filmtec's Membranes for about 6 years now without any issues and they will both outperform and outlast the competition.  An inline or handheld TDS meter will let you know when it is time to change your cartridges.

I have tried several different 10" Reverse Osmosis filter cartridges but none seem to compare to a good Purtrex Sediment filter mixed with KX's Matrikx CTO2 and Matrikx + 1 Carbon Block Filters.  As far as the Deionization is concerned purchase an inexpensive clear refillable canister and  1.25 pounds of DI Resin to fill it.  This will save you $15-20 every six months on the DI component.  There is absolutely no advantage in using prefilled, branded DI cartridges unless you work for the company that sells them.

Get yourself a quality RODI System and make water whenever you need it!  You can also make great tasting drinking water (just don't drink water after it goes through the DI Canister).  You can purchase a y splitter for a few dollars to bypass the DI Canister. 

The benefits of using RODI water in your reef tank are too great to ignore and you will definitely save money in the near future.

About the Author

Daniel J Annable

Owner of http://aquarium-products.ca and marine hobbyist.

 

Analog TDS Meter: HY $247 Myron L Analog TDS Meter. Displayed in PPM. Use the 1500 ppm standard solution for agriculture. 1 EC or 10 CF = 700 ppm.

Grochek TDS Meter: HY $106.03 HANNA GRO CHEK TDS Meter. Locate probe in your nutrient tank or reservoir for continuous TDS readings. A very handy device for the serious gardener. This unit is designed to have the electrode continuously submerged in the nutrient solution. Calibrate monthly or when readings are not constant.

Analog TDS/pH Meter: HY $533 MYRON L. ANALOG pH and TDS METER, TDS displayed in PPM. 1500 ppm solution standard for calibration (442). 1EC or 10 CF = 700 ppm. pH standard use 4, 7 or 10 whichever is closer to the samples tested.

Zero Technologies / 23 Cup Dspnsr w/Free TDS Meter / ZD-018 $51.69 Zero Technologies - 23 Cup Dspnsr w/Free TDS Meter - ZD-018

Zero Technologies / 8 Cup Pitcher w/Free TDS Meter / ZD-013 $46.41 Zero Technologies - 8 Cup Pitcher w/Free TDS Meter - ZD-013

Liquatec PM3000 TDS Pocket Meter $46.37 Features:. The Liquatec PM3000 TDS Pocket Meter measures total dissolved solids in water from 1 to 2 999 ppm. The PM3000 Pocket TDS Meter comes with a plastic carrying case for easy transport and safe storage. With its extended range of 12 999 ppm the Liquatec PM3000 meter can work with most any well water application with out the need of two different meters. Obtain reliable and accurate measurements of your water source with the PM3000. Ideal for water treatment as well as other industrial and commercial application. This model is lightweight and simple to operate. The PM3000 auto shutoff function shuts the meter off automatically after 15 minutes of nonuse to conserve batteries. The Liquatec PM3000 TDS Meter display is a large and easytoread LCD screen. The Liquatec PM3000 TDS Meter is factory calibrated so recalibration is not necessary for initial testing. Recalibration can be done easily with a watch screwdriver. Recalibration instructions are included with the TDS Meter. The Liquatec Total Dissolved Solids Meter can be used in the following applications:. 1. Water Purification. 2. Reverse Osmosis. 3. Distillation. 4. DeIonization. 5. Pool Spa Maintenance. 6. Aquariums. 7. Plating Industry. 8. Cooling Towers Boilers. 9. Photographic Labs. Specs:. Auto ShutOff after 15 minutes of nonuse. Automatic Temperature Compensation. TDS Range: 12 999 ppm. Resolution: 1 ppm. Accuracy: +/ 5 77F (25C). Battery (included): Single 3V Lithium CR2032. Battery Life: 30hrs. Weight: 1.3oz (37g). Size(LxWxH): 5.8 x 1.2 x 0.6 in (146 x 30 x 15mm).

Tds Meter With 1 Point Manual Calibration $191.36 The MW401 is a compact Conductivity and TDS

EC/TDS/Temp Combo Waterproof Meter Model Com-100, EC/TDS Replacement Probe Only (Special Order): J $39.3 This is the replacement probe only for J_ 716160 : Ec/Tds/Temp Combo Waterproof Meter Model Com-100, not the meter itself, just the replacement probe or the meter.

Portable TDS Meter [model SM401]: J $90.9 Model SM401 TDS meter: Range: 0.0 - 1990 ppm – with automatic temperature compensation and 1 point manual calibration supplied with MA811D/1 TDS probe, 9v battery, 20ml 1382 ppm packet buffer solution, screwdriver for calibration.

Hanna TDS/EC/Temperature Meter: HY $114.35 Hanna Instruments model HI 98311. TDS ( reads in PPM), EC and temperature meter tester. Waterproof and designed to float. Feels great in your hand. Very stylish and modern. Low battery indicator. A great buy.

Milwaukee International MINMW401 Milwaukee MW401 Tds Meter With 1 Point Manual Calibration $104.98 The MW401 is a compact Conductivity and TDS

Hand Held TDS Conductivity Meter $79.99 Trust nothing less than precision when it comes to testing electrical conductivity, TDS and temperature in your aquarium. Spectrapure's handheld meter is the only one available true to the curved scale, as opposed to a linear factor. The temperature compensation coefficients are also matched to the respective scales ensuring greater precision. Each meter can be calibrated digitally to any known value, unlike most testing devices which can only be calibrated to a few. Other features include: Resolution down to 0.1 micro S On-screen temperature display in Celsius or Fahrenheit Auto ranging 0-9990 micro S, 0-8560 ppm Detachable platinum electrodes Low battery indicator Waterproof and floats Uses three 1.5V button cell batteries (included) Includes lanyard and user's guide

Total Dissolved Solids (TDS) Meter $64.65 Use this TDS meter to check the performance of your water filter and check for hardness. Make sure you always drink pure water with this handy meter.Check the performance of your water filterCheck for hardness (1grain=17ppm)Make sure you always drink pure water Hold function: Saves measurements for convenient reading and recording Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteriesDual Range: Measures from 0-999ppm, with a resolution is 10ppm, indicated by drinking x10image Factory calibrated Range: 0-9990 ppmAccuracy: +/- 2-percent Requires two 1.5-volt batteries (Button Cell)Size: 5.5 inches x 0.9 inches x 0.55 inches Weight: 32g (1.13 ounces)

GroCheck TDS EC/TDS Meter (Model HI983301N): J $97.71 Water-resistant EC/TDS Meter with 0.7 TDS conversion factor These state-of-the-art meters have been engineered with a host of features suited to the aggressive environments commonly found in agricultural applications; housings and cable connections have been sealed against vapor and humidity. With a 12 Vdc power supply included with the meter, low battery failures are never an issue. Locate the meter right above the sample to be monitored or take it with you for spot checking. Select HI 983301N for TDS measurements with the common 0.7 TDS conversion factor (4-4-2) or HI 983301N/5 which uses a 0.5 conversion factor. Both the TDS and EC meters come with a probe specifically made for horticulture and hydroponics applications. The probe compensates for temperature variations automatically, is easy to clean and is very stable, needing little maintenance. Includes: HI 983301N is supplied with HI 7634 probe, 12 Vdc adapter, 1500 ppm calibration solution (20 mL), calibration screwdriver and instructions. Specifications MSDS Downloads Range 0 to 1990 ppm (mg/L) Resolution 10 ppm Accuracy ±2% F.S. Calibration manual at 1 point, through trimmer Temperature Compensation automatic, 5 to 50°C (41 to 122°F) with ß=2%/°C TDS Conversion Factor 0.7 Probe HI 7634 (included) Power Supply 12 Vdc power adapter (included) Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 86 x 110 x 43 mm (3.4 x 4.3 x 1.7'') Weight 215 g (7.6 oz.) Manufacturer’s Instructions are online here: http://www.hannainst.com/manuals/manHI_983301N_02N.pdf

Ph, EC,Tds Meter Kit $454.95 The Milwaukee AG900 is a complete testing kit that includes all you need to produce accurate reading for 3 of the most important levels in your plant production pH, EC (Electrical Conductivity) and TDS (Total Dissolved Solids)Each of these factors can be very important to your plants and their chance to survive and thriveThe SM802, with a conductivity range that goes up to 6.00 mS/cm and the TDS up to 4000 ppm is ideal for testing in crop production. Soil and well water pH that is too acidic or alkaline can have an adverse effect on plant nutrient and water uptake and directly affect the efficiency of fertilizer, herbicides and pesticidesSoil Conductivity is checked before fertilizer application to pinpoint field needs and after fertilization to establish its effectivenessSupplice with the MA850 interchangeable probe to measure pH, Conductivity and TDSThe pH electrode utilizes a fiber junction to reduce contamination when measuring fertilizer solutionsIncludes: SM802 Hand-held microprocessor, Measuring cup (used for testing soil), Calibration solution, Protective carrying case, 9V batteryIn-Depth manual that explains how to successfully operate your testing kit

Hanna pH/TDS/EC Meter: HY $171.55 The HI98129 Combo tester from Hanna Instruments is designed for fast, efficient and high accuracy pH, EC/TDS and temperature measurements. No more switching meters to measure the pH and then the EC or TDS of a solution.This tester has a hold feature to prompt the user when to take the reading & a display freeze for easy and accurate recording. Calibration and temperature compensation is automatic. The combo has a replaceable pH electrode cartridge and an EC/TDS graphite electrode, which resists contamination. The temperature probe is stainless steel, for faster and more precise measurement.

HM Digital ZT2 Basic TDS Meter $40.79 The ZT2 Is highly efficient and accurate due to its advanced microprocessor technology. The ZT2 Tests for inorganic materials commonly found in drinking water. The ZT2 May be used on all types of water except hot water. The ZT2 Is an economy model that is ideal for endusers and retail products. The HM Digital ZT2 has an autooff function: the meter shuts off automatically after 10 minutes of nonuse to conserve batteries. The HM Digital ZT2 has a measurement range: 0999 ppm. The ZT2 has a large and easytoread LCD screen. The ZT2 is factory calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a miniscrewdriver. The EPA Secondary Regulations recommend a maximum contamination level (MCL) of 500mg/liter (500 parts per million (ppm)) for Total Dissolved Solids. Many water supplies exceed this TDS level. When TDS levels exceed 1000mg/L it is usually considered unfit for human use. After reverse osmosis distillation deionization microfiltration the TDS level should be less than 50 ppm. Test your incoming water supply and the treated water to determine how much Total Dissolved Solids are being removed from the water. At least 80 of the TDS in your water should be removed. If the TDS rejection is less than 80 it is time to change your RO membrane. Range: 0 999 ppm (mg/L). Resolution: 1 ppm (0999 ppm). Accuracy: +/ 3. Conversion Factor: NaCl (avg. 0.5). Power source: 2 x 1.5V button cell batteries (included) (357A). Battery life: Approx. 1000 hours of usage. Dimensions: 14 x 2.3 x 1.5 cm (5.5 x 0.9 x 0.75 ).

Grochek Waterproof pH/EC/TDS Meter (Model HI 9813-0) Replacement Probe Only (HI1285-0) Special Order: J $122.36 This is the Replacement Probe Only for Waterproof pH/EC/TDS Meter (Model HI 9813-0) (sku: J_ 716835), not meter itself, just the replacement probe only.

HM Digital Calibration Fluid for Handheld TDS Meter - 3 oz. $7.99 NaCl calibration solution is designed for use with HM Digital's Handheld TDS Monitor. 342 ppm.

Hanna pH/TDS/EC Meter Replacement Probe: HY $54.03 HANNA REPLACEMENT PROBE FOR HI98129 EC/TDS/PH/TEMP, and HI98127 PH meters.

TDS Monitor SMS410: J $99.87 The SMS 410 Smart TDS Monitor allows you to continuously monitor Total Disssolved Solids directly in your aquatic environment. Features include: a user selectable set point, visual LED alarm when readings go below the set point and easy single-point manual calibration. Powered by the included 12VDC adapter the meter is also supplied complete with a TDS electrode. Large and easy to read LCD Low Cost Easy to Use User Selectable Alarm set point TDS Electrode Included RANGE 0 to 1999 ppm RESOLUTION 1 ppm ACCURACY ± 2% Full Scale CALIBRATION Manual 1 point SET POINT RANGE 700 - 1800 ppm ALARM Active when reading is Lower then set point ELECTRODE MA812/2 (included) POWER SUPPLY 12VDC Adapter (included) DIMENSIONS 80 x 145 x 35mm 1500 ppm packet buffer solution and screwdriver for calibration.

Grochek Waterproof pH/EC/TDS Meter (Model HI 9813-0): J $208.21 HI 9813-0 (sku: J_716835) allows you to measure pH, EC (conductivity) and TDS with just one instrument! This meter has a full-spectrum pH measurement range. The EC range goes to 4.00 mS/cm. In the TDS range, both instruments use a conversion factor from 0.56 to 0.72 for fertilizer readings, to ensure your measurements fully conform to industry standards. The specially engineered HI 1285-0 (sku: J_ 716836) probe is interchangeable and the pH electrode utilizes a fiber junction and gel electrolyte which are particularly suitable when used in fertilizer solutions. HI 9813-0 measures TDS in the 0 to 1999 ppm range.

Fisher Scientific Accumet AP75 Portable Waterproof Conductivity/TDS Meter $663 Features of the Fisher Scientific Accumet AP75 Portable Waterproof Conductivity/TDS Meter: Rugged waterproof and dustproof meter floats and withstands rough conditions existing in the field or industrial settings. Dual-display LCD shows conductivity or TDS plus temperature in °C or °F. Meter switches between readings with the press of a button. Advanced features for easy customization. Includes: Meter/Probe package includes meter, K = 1.0cm-1 conductivity/temperature plastic-bodied probe with 3 ft. (0.9m) long cable (13-620-AP54), four "AAA" batteries, and instruction manual. Selectable cell constant (0.1cm-1, 1.0cm-1, or 10cm-1). Autoranges for conductivity across five ranges and TDS across six for fast response. Calibration up to five points for both conductivity and TDS measurements. Adjustable temperature coefficient from 0 to 10% per °C offers accurate compensation in almost any solution. Selectable auto endpoint freezes reading immediately after meter indicates stabilization. Expanded memory function stores and recalls up to 50 readings. Real-time clock enables stored and calibration data to be combined with date and time for more complete recordkeeping. HOLD function and auto shutoff. Dimensions: 7.5L x 3.75W x 2.25 in.H (19 x 9.5 x 5.7cm). Conductivity Mode: * Range: 0.00 to 19.99?S, 0.0 to 199.9?S, 0 to 1999?S, 0.00 to 19.99mS, 0.0 to 199.9ms * Resolution: 0.01?S, 0.1?S, 1?S, 0.01mS, 0.1mS * Accuracy: ±1% of FS * Cell Constants: 0.1cm-1, 1.0cm-1, 10cm-1 TDS Mode: * TDS Mode: 0.00 to 9.99ppm, 10.0 to 99.9ppm, 100 to 999ppm, 1.00 to 9.99ppt, 10.0 to 99.9ppt, 100 to 200ppt * Resolution: 0.01ppm, 0.1ppm, 1ppm, 0.01ppt, 0.1ppt, 1ppt * Accuracy: ±1% of FS Temperature Mode: * Range: 0° to 100°C (32° to 212°F) * Resolution: 0.1°C/0.1°F * Accuracy: ±0.5°C/0.5°F * Compensation: Manual or Automatic

EcoTestr™ TDS Low: J $73.06 New Oakton EcoTestr™ TDS Low pocket meter features a large ergonomically designed display so that you can easily view measurements at a glance. The stainless steel electrodes are both rugged and chemical resistant, for use in a variety of applications. Other features include ATC (Automatic Temperature Compensation), Hold Function, it is completely waterproof, and has a transparent plastic cap that can be used as a container for calibration or measurement purposes. Range: 0-1990 ppm. Resolution: 10 ppm. Accuracy: 1% Full Scale. Conversion Factor: 0.4 to 1.

HM Digital COM100 Waterproof Combo Meter for EC#44; TDS and Temperature $93.96 COM100 Waterproof EC TDS + Temperature combo Water Tester. 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. This Electronic Water Tester can measure Total Dissolved Solids (TDS) in water and Temperature. Measures electrical conductivity (EC) total dissolved solids (TDS) and temperature. Three different calibration options (KCl 442TM NaCl) each with its own nonlinear conversion factor. Automatic Temperature Compensation (ATC) using three temperature coefficients. Waterproof housing. Measurement Range: 09990 S; 08560 ppm (autoranging). Digital Calibration (push button). Autooff function datahold function and lowbattery indicator. Display: large and easytoread LCD screen includes simultaneous temperature reading. The COM100 watermeter is calibrated with a S solution. The meter can be recalibrated with digital calibration using the push buttons rather than a screwdriver. Includes a cap batteries and lanyard. HM Digital TDS meters come factory calibrated and are ready to use. They are designed to stay consistent. However after prolonged usage it may help to recalibrate your meter using a commercial standard NaClbased solution which is approximately 0.5 S of conductivity. Immerse the meter into the calibration solution. If the meter does not read within 2 of the calibration solution adjust the reading by inserting a mini screwdriver (not included) into the trimmer pot (the hole on the back of the meter). Turn the trimmer clockwise to increase the reading and counterclockwise to decrease the reading. Note that the adjuster is very sensitive. EC Range: 0 9990 S. TDS Range: 08560 ppm (mg/L). Temperature Range: 080 C; 32176 F. Resolution: 099: 0.1 S/ppm; 100999: 1 S/ppm; 10009990: 10 S/ppm. Temp. resolution is 0.1 C/F. Accuracy: +/ 2. EC to TDS Conversion Fa

Smart Combined pH/EC/TDS Meter SM802: J $195.46 The SM802 is a low cost portable pH,Total Dissolved Solids and Conductivity Meter with Automatic Temperature Compensation. The meter comes complete with the MA850 Combination Electrode. This is the High-Range TDS/EC Model, the comparible Low-Range TDS/EC Model is the SM801 Some of the SM801's features include: 1 Probe for pH, EC & TDS (High-Range) Automatic Temperature Compensation(ATC) Large and Easy to Read LCD Easy to Use Easy to Calibrate RANGE 0.00 - 14.00 pH 0.00 - 6.00 mS/cm 0 - 4000 ppm RESOLUTION 0.10 pH 10 mS/cm 10 ppm ACCURACY ±0.20 ±2% Full Scale ±2% Full Scale TDS RATIO 0.68 CALIBRATION Manual 1 point TEMPERATURE COMPENSATION Automatic from 0-50°C ELECTRODE MA850 (included) ENVIRONMENT 0 to 50°C and 95% RH max BATTERY TYPE/LIFE 1 x 9V / 150 hours DIMENSIONS 185 x 82 x 45mm USER MANUAL PORTABLE pH/EC/TDS METER MODEL: SM801. SM802 Each meter is supplied complete with: • MA850 combination, amplified, double-junction, gel pH-electrode with incorporated EC/TDS probe and built-in temperature sensor; 1 m cable • pH7.01, 1413 mS/cm & 1382 ppm (for SM801) or 1500 ppm (for SM802) solutions, 20 mL each • 1x9V battery • Instruction Manual. OPERATION Slide off the battery compartment cover on the back of the meter. Install the battery while paying attention to its polarity. Connect the probe to the meter securely by aligning the pins with the socket and pushing the plug in. Always remove the electrode protective cap before use. Make sure that the meter has been calibrated before taking any measurements. Turn the instrument on by pressing the ON/OFF key. pH MEASUREMENTS If the probe has been left dry, soak the tip in a pH7 (M10007) buffer solution for a few minutes to reactivate it. Submerge the tip into the sample to be measured, select the pH mode and allow the reading to stabilize before taking any measurement. EC/TDS MEASUREMENTS Immerse the tip of the probe into the sample to be tested. Select the desired measurement range (EC or TDS) and wait for the temperature sensor to reach thermal equilibrium with the sample before taking any measurement. AFTER MEASUREMENTS, switch the instrument off, clean the probe and store it with a few drops of storage solution in the protective cap. CALIBRATION PROCEDURE Remove the protective cap from the probe. Switch the meter on. Select the desired range (pH, EC, TDS) by pressing the appropriate key. pH Calibration The instrument can be manually calibrated at one point for pH. A) PREPARATION If the samples to be measured are neutral or close to neutral pH, to obtain accurate readings use pH 7.01 buffer solution (M10007). The pH 4.01 buffer (M10004) is suitable for acidic measurements, while the pH 10.01 (M10010) buffer should be used for alkaline samples. B) PROCEDURE Rinse the tip of the probe and immerse it in the buffer chosen for calibration. Wait a couple of minutes for the reading to stab

Grocheck Combo Meter (pH/EC/TDS/Temp): HY $244.35 HI9813-6 GROCHECK PORTABLE COMBO.pH/EC/TDS/Temp Meter with F.S.T. Technology New Technology to Check the Status of the ElectrodeMeasures a Variety of Parameters with One InstrumentFast Response Probe HANNA instruments® developed new F.S.T. technology for the new HI 9813-6. With this special security system, if the meter encounters incorrect readings, the instrument doesn’t display values close to pH 7, but close to pH 4, making the problem clear. To allow maximum confidence in your measurements, the meter is equipped with two LEDs and a Check button. When pressing this button, after immersing the electrode in the proper solution, HI 50021P (Cal-Check solution), one of the LED’s will light up to indicate the status of the meter. The green LED (OK) indicates the probe is working correctly, while the red LED (C&C Clean & Cal) indicates the electrode needs attention.HI 9813-6 is supplied complete with pH/EC/TDS/T HI 1285-6 probe with 1 m cable, pH 7, 1.41 mS/cm and 1500 ppm calibration solution (20 mL each), cleaning solution 2 pcs), HI 50021 test solution (2 pcs), blue protective case, battery and instructions.

139 TDS Tester Kit $18.5 This TDS Tester is an economical tester for non-professional as well as the professional. The smallest and lightest on the market.Features:Sturdy and sleek design.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.Display: large and easy-to-read LCD screen.Factory Calibrated: calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.Specification:Range: 0 - 9990 ppm (mg/L)Resolution: 1 ppmAccuracy: +/- 2%ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Farenheit)Power source: 2 x 1.5V button cell batteries (included)Battery life: 1000 hours of usageSize: 150*25*15mm

HM Digital Pocket Sized TDS Meter with Digital Thermometer TDS4TM $43.04 The Total Dissolved Solids Pocket Size TDS4TM Meter is the smallest and lightest TDS meter available in the market. The TDS4TM Pocket Size Meter is useful for all water purification applications wastewater regulation and colloidal silver. Hold Function: Saves measurements for convenient reading and recording. Autooff Function: Turns off meter after 10 minutes of nonuse to conserve batteries. The HM Digital TDS4TM Meter includes an internal digital thermometer (Celsius). Dual Range: Measures from 0 999 ppm with a resolution of 1ppm. From 1000 to 9990 ppm the resolution is 10 ppm indicated by a blinking x10 image. Factory Calibrated: The meter is calibrated with a 342 ppm NaCl solution and can be recalibrated with a miniscrewdriver. The TDS4TM total dissolved solids meter is recommended for aquariums aquaculture horticulture hydroponics pools spas and water cooler professionals. Total Dissolved Solids Range: 09990 ppm (mg/L). Temperature Range: 080 degrees Celsius. Resolution: 1 ppm 1 degree Celsius. Accuracy: +/ 2. Conversion Factor: NaCl (avg. 0.5). ATC: Builtin 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) (357A). Battery Life: 1000 hours of usage. Dimensions: 5.5 H x 0.9 W x .55 D.

HM Digital DL-1 Dual TDS Meter MTR-TDS-DM1-0-9990-4 $29.99 HM Digital device uses electrode probes to monitor input TDS and output TDS in your RO unit or other water purification system to determine when filter cartridges need replaced. Advanced micro-processor takes accurate readings. Factory calibrated for ultimate performance. Installs quickly and easy with quick connect T-fittings.

Grochek Primo TDS Tester: J $32.26 The Primo TDS tester provides a fast and dependable way to measure the Total Dissolved Solids in your water samples. It is ideally suited for the rigorous demands of water quality professionals, who will appreciate the practicality of Primo's easy-to-read LCD when demonstrating the before and after results of conditioning and filtration systems. Temperature is compensated automatically to ensure the readings are consistent to the standard or reference temperature. Operating and routine maintenance has never been easier. Primo TDS uses a single button at the top of the meter. Press it once and the meter is powered and ready for use. Press and hold the button for a few seconds and Primo automatically enters calibration mode. Simply open a sachet of the calibration solution, dip the probe and within seconds the meter recognizes the calibration solution and calibrates itself! Maximum battery life is managed by Primo's power microprocessor, which automatically turns it of after 5 minutes.

EC/TDS/Temp Combo Waterproof Meter Model Com-100: J $63.71 Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature. Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor. Automatic Temperature Compensation (ATC) using three temperature coefficients. Waterproof housing. Measurement Range: 0-9990 µS; 0-8560 ppm (auto-ranging). 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 COM-100 meter is calibrated with a 1413 µS solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver. Includes a cap, batteries and lanyard. One year warranty.

ZeroWater ZD018 23-Cup Water Dispenser, Cold Dispenser Type, Fluid Preservation Tank, Filtration System, 5 Filtering Stages, Built-in Fridge,TDS Meter $46.99 ZeroWater ZD018 23-Cup Water Dispenser, Cold Dispenser Type, Fluid Preservation Tank, Filtration System, 5 Filtering Stages, Built-in Fridge,TDS Meter

PTTestr 35 (Ph/TDS/Temp): J $156.65 One pocket sized meter for pH, TDS and temperature! Up to 5 point pH calibration with NIST or USA auto buffer recognition. Great for water, laboratory or plant use, this multi Testr features single-junction pH electrodes for longer life and wider range of sample compatibility. Pin-style conductivity sensors feature stainless steel electrodes for chemical resistance and durability. Replaceable sensor module saves you money by reusing the meter body. Advanced features include auto-shutoff, user-adjustable temperature coefficient, self-adjusting TDS, and low-battery indicator.

TDS Calibration Solution 1000 Ppm, 3 fl oz: J $6.76 For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. NaCl calibration solution. Comes in lightweight HDPE plastic bottle. Sealed with a coated foam liner. The HM Digital TDS Calibration Solution (1000 PPM) is used to periodically re-calibrate your HM Digital TDS meter or HM Digital Water Quality Tester. The 1000PPM TDS Solution is designed for use with beverages, brewing kits, aquariums, pools, spas, and more. HM Digital C1000 TDS Calibration Solution (1000 PPM) Specifications: •3 ounce bottle •NaCl solution (1000 PPM) •Works for 5-10 calibrations •Shelf life of about 6-9 months

Smart Combined pH/EC/TDS Meter SM802 Replacement Probe Only: J $84.11 This is the replacement probe only, not the Smart Combined pH/EC/TDS Meter SM802 itself – just the meter replacement probe only. The SM802 is a low cost portable pH,Total Dissolved Solids and Conductivity Meter with Automatic Temperature Compensation. The meter comes complete with the MA850 Combination Electrode. This is the High-Range TDS/EC Model, the comparible Low-Range TDS/EC Model is the SM801 Some of the SM801's features include: 1 Probe for pH, EC & TDS (High-Range) Automatic Temperature Compensation(ATC) Large and Easy to Read LCD Easy to Use Easy to Calibrate RANGE 0.00 - 14.00 pH 0.00 - 6.00 mS/cm 0 - 4000 ppm RESOLUTION 0.10 pH 10 mS/cm 10 ppm ACCURACY ±0.20 ±2% Full Scale ±2% Full Scale TDS RATIO 0.68 CALIBRATION Manual 1 point TEMPERATURE COMPENSATION Automatic from 0-50°C ELECTRODE MA850 (included) ENVIRONMENT 0 to 50°C and 95% RH max BATTERY TYPE/LIFE 1 x 9V / 150 hours DIMENSIONS 185 x 82 x 45mm USER MANUAL PORTABLE pH/EC/TDS METER MODEL: SM801. SM802 Each meter is supplied complete with: • MA850 combination, amplified, double-junction, gel pH-electrode with incorporated EC/TDS probe and built-in temperature sensor; 1 m cable • pH7.01, 1413 mS/cm & 1382 ppm (for SM801) or 1500 ppm (for SM802) solutions, 20 mL each • 1x9V battery • Instruction Manual. OPERATION Slide off the battery compartment cover on the back of the meter. Install the battery while paying attention to its polarity. Connect the probe to the meter securely by aligning the pins with the socket and pushing the plug in. Always remove the electrode protective cap before use. Make sure that the meter has been calibrated before taking any measurements. Turn the instrument on by pressing the ON/OFF key. pH MEASUREMENTS If the probe has been left dry, soak the tip in a pH7 (M10007) buffer solution for a few minutes to reactivate it. Submerge the tip into the sample to be measured, select the pH mode and allow the reading to stabilize before taking any measurement. EC/TDS MEASUREMENTS Immerse the tip of the probe into the sample to be tested. Select the desired measurement range (EC or TDS) and wait for the temperature sensor to reach thermal equilibrium with the sample before taking any measurement. AFTER MEASUREMENTS, switch the instrument off, clean the probe and store it with a few drops of storage solution in the protective cap. CALIBRATION PROCEDURE Remove the protective cap from the probe. Switch the meter on. Select the desired range (pH, EC, TDS) by pressing the appropriate key. pH Calibration The instrument can be manually calibrated at one point for pH. A) PREPARATION If the samples to be measured are neutral or close to neutral pH, to obtain accurate readings use pH 7.01 buffer solution (M10007). The pH 4.01 buffer (M10004) is suitable for acidic measurements, while the pH 10.01 (M10010) buffer should be used for alkaline samples. B) PROCEDUR