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    …features a digital display and comes with two 1/4" GA Murdock Quick Connect Tee's with double o-rings to ensure a proper seal. As with all HM-Digital products, the DM-2 comes factory calibrated. The DM-2 is an upgrade to the DM-1 TDS Meter:   TDS Meter Installation Instructions

    $45.99 Regular Price: $

    …water. Seawater contains a variety of elements that will contribute to the overall specific gravity of the water. Many digital salinity meters are calibrated to read a sodium chloride only or brine solution and when applied to seawater, measurements are not accurate. The SAL-1700 is…

    $69.99 Regular Price: $

    …light meter * Early warning, intelligent software predicts future water conditions* * Convenient alerts sent to e-mail and mobile phone* * Access results worldwide, data stored online for easy viewing* * Track your results with automatic graphing* * USB connection (2.5 meters)

    $209.99 Regular Price: $

    …tanks, AutoAqua now has four great TDS meter options built on a compact, feature-rich, and easy to install platform! BRS recommends using a TDS meter as one of the most useful tools for ensuring your RO or RO/DI system is functioning at its best. A TDS meter can not only provide peace of mind in…

    $44.99 Regular Price: $

    meter. When you're ready to send the PAR meter and wand back, just let us know through email, phone, or live chat, and we will have a return label sent to your email right away. Just repackage the meter and wand then drop it off at any UPS location. *Deposits are fully refundable, granted the meter

    $69.99 Regular Price: $

    …tanks, AutoAqua now has four great TDS meter options built on a compact, feature-rich, and easy to install platform! BRS recommends using a TDS meter as one of the most useful tools for ensuring your RO or RO/DI system is functioning at its best. A TDS meter can not only provide peace of mind in…

    $24.99 Regular Price: $

    Easily replace the low voltage metering pump for your Tunze Osmolator Universal 3155 auto top off system.

    $23.99 Regular Price: $

    …junctions are well known for creating clogs that can cause erratic and incorrect readings. By tearing a small portion of the cloth away from the meter, you will expose a fresh surface helping extend the life of the pH electrode. Calibration is even easier by pressing the dedicated calibration…

    $49.50 Regular Price: $

    …last about a year or so until the electrode needs to be replaced, and traditionally you would need to buy a whole new metering pen, now you do not have to replace the meter! Just replace the pH cartridge that houses the electrode, and the sturdy snap-in connector will hold the electrode in place…

    $157.99 Regular Price: $

    …and ORP aquarium equipment. The attractive price and high quality has made Milwaukee an increasingly popular choice for aquarists. Milwaukee Smart meters are manufactured to be easy to use, practical and accurate. They are ideal for saltwater aquarium use and provide stable reliable results. Manual…

    $130.99 Regular Price: $

    …RODI system without a TDS meter is like driving a car without a speedometer and gas gauge.  At some point you will end up in trouble.  With RODI systems it is TDS that you will want to monitor for performance and filter quality.  By using a dual TDS meter it will allow you to see your…

    $29.99 Regular Price: $

    …actually put out more light than your corals will actually need and without a PAR Meter to test the overall output, it is really hard to guess if the light is too dim or intense. We highly suggest using a PAR Meter to test the output of your lights at different points throughout your tank that you…

    $366.50 Regular Price: $

    The Milwaukee pH600 pH Pen is an economical easy to use meter that returns quick, reliable pH measurements. This is a great option for quick spot checks such as when mixing water or when testing tap water or RO/DI output. Specifications: * Range: 0.0 - 14.0 pH * Resolution: 0.1…

    $24.99 Regular Price: $

    …days for the most reliable readings. Available in: 4.01 pH 7.01 pH 10.01 pH   Compatible with all pH meters and probes.   Milwaukee Calibration Solution sold in single use packets.   Almost all pH monitors and controllers…

    $1.09 Regular Price: $

    The TDS-3 Handheld TDS Meter from HM Digital is a useful tool to spot check the TDS of your home water supply or RO/DI unit output. This unit features a digital display, built in thermometer, and comes with a carrying case. As with all HM-Digital products, the TDS-3 comes factory calibrated.

    $24.99 Regular Price: $

    …COM-100 Waterproof Meter. * Automatic Temperature Compensation (ATC) * IP-67 Waterproof Housing * Large LCD Screen * Auto-Off  * Low-Battery Indicator * Digital Calibration * Factory Calibration   Conductivity Meters are ideal for many…

    $76.95 Regular Price: $

    …TDS Meter! Just add DI resin. We suggest using BRS Pro Series Single Bed Cation Resin, Pro Series Single Bed Anion Resin, and Pro Series Mixed Bed Cation Color Changing Resins. * Super efficient * Choose your own resin * Stop throwing away good resin * Triple TDS Meter

    $89.99 Regular Price: $

    …TDS meter is like driving a car without a speedometer and gas gauge.  At some point you will end up in trouble.  With RODI systems it is TDS that you will want to monitor for performance and filter quality.  If you have a single or dual DI stage we highly recommend a triple TDS meter

    $44.99 Regular Price: $

    …of 6000K and 22000K (approx.) phosphor blend. It is specifically designed for reef aquariums mimicking sea water to a depth of one to twenty meters. It can be used for growing SPS corals up to 80cm in the aquarium.   T5 lighting has been a staple in the hobby with the ability…

    $18.99 Regular Price: $

    …and health, but the meters are very expensive and only require a couple uses right when you get your lights set up and running, making them a hard to justify the purchase. We now offer a PAR meter rental program that lets you use an Apogee MQ-210 Underwater Quantum PAR Meter and Apogee Sensor…

    $59.99 Regular Price: $

    …is greater than 50% of maximum) * Sensor Dimensions - 2.4 cm diameter and 2.8 cm height * USB Cable - 2 m (6 ft) * Warranty - 4 years   What's Included? 1x Apogee MQ-210 PAR Meter and Sensor   Want to rent an Apogee MQ-210 PAR Meter? Click Here

    $377.00 Regular Price: $

    …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,…

    $79.99 Regular Price: $

    The Milwaukee MW101 pH Meter with battery is a low cost, high quality and reliable pH meter. The Milwaukee MW101 pH Meter ships complete with a pH probe, calibration solution, a 9V battery, instruction manual and a screwdriver for easy calibration. Milwaukee Instruments offers the most…

    $96.99 Regular Price: $

    …tanks, AutoAqua now has four great TDS meter options built on a compact, feature-rich, and easy to install platform! BRS recommends using a TDS meter as one of the most useful tools for ensuring your RO or RO/DI system is functioning at its best. A TDS meter can not only provide peace of mind in…

    $24.99 Regular Price: $
    Out of Stock

    …tanks, AutoAqua now has four great TDS meter options built on a compact, feature-rich, and easy to install platform! BRS recommends using a TDS meter as one of the most useful tools for ensuring your RO or RO/DI system is functioning at its best. A TDS meter can not only provide peace of mind in…

    $33.99 Regular Price: $

    …in the meter and will automatically compensate for any effects underwater readings may have.   Apogee has calibrated the MQ-510 sensor with electronic lights that is stored in the firmware of the meter. Calibration with electronic lighting makes it the perfect PAR meter for any…

    $538.00 Regular Price: $

    …a PAR meter to verify the light intensity you will have tangible numbers to go off of. With the PQ-510 you can not only get instant on-the-spot PAR measurements, but now you can log thousands of data points in the app and store them on your phone.   The extended 2 meter cable of…

    $592.00 Regular Price: $

    With the amazing Kill A Watt you´ll know “Watts” killing your energy bill...   Monitoring your power consumption will allow estimate how much your tank will cost you in electrical usage. By plugging in your electrical devices the Kill a Watt will tell you how many…

    $26.99 Regular Price: $

    The SM-1 Single Inline TDS Meter from HM Digital measures the TDS of a single water line. This is a great tool to monitor the TDS of your reverse osmosis system. Common monitoring locations include pre-system, post membrane or post DI stage. This unit features a digital display and comes with a 1/4"…

    $24.99 Regular Price: $

    Meter Preinstalled Metering Locations Sensor 1 - Incoming water to DI stage Sensor 2 - Final output from DI stage 2   Dimensions - 10" x 6.25" x 14"   What's Included? 1x Dual Deionization Canister Assembly 1x HM Digital DM-1 Dual TDS Meter  …

    $99.99 Regular Price: $

    Single deionization add on canister kit complete with Dual TDS Meter and pre-packed color changing DI cartridges! Dimensions - 14" x 6" x 5.5" * Dual TDS Meter already installed * Perfect for adding additional DI stages to your RO system * Cartridges come with canisters…

    $64.99 Regular Price: $

    …Cation Resin Stage 2 - Pro Series Anion DI Resin Stage 3 - Pro Mixed Bed Cation DI Resin   Triple TDS Meter Preinstalled Metering Locations Sensor 1 - Incoming water to DI stage Sensor 2 - After DI stage 2 and before DI stage 3* Sensor 3 - Final…

    $125.99 Regular Price: $