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    HM Digital Calibration Fluid for Handheld TDS Meter - 3 oz.

    HM Digital Calibration Fluid for Handheld TDS Meter - 3 oz.

    NaCl calibration solution is designed for use with HM Digital's Handheld TDS Monitor. 342 ppm. more

    $11.09

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    HM Digital Handheld Meters pH Buffer Packets (mfg# HM PH-BUF)

    HM Digital Handheld Meters pH Buffer Packets (mfg# HM PH-BUF)

    Professional handheld digital meters at an unbeatable price! HM Digital Handheld Meters offer superior construction and performance to aquarium hobbyists at a very economic cost. Precision devices boast advanced microprocessor technology to ensure... more

    $9.95

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    HM Digital Handheld Meters pH/ORP Storage Solution (mfg# HM OP-STOR)

    HM Digital Handheld Meters pH/ORP Storage Solution (mfg# HM OP-STOR)

    Professional handheld digital meters at an unbeatable price! HM Digital Handheld Meters offer superior construction and performance to aquarium hobbyists at a very economic cost. Precision devices boast advanced microprocessor technology to ensure... more

    $6.95

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    HM Digital HM-DIGITAL-ZT-2 Basic TDS Meter

    HM Digital HM-DIGITAL-ZT-2 Basic TDS Meter

    The ZT-2 Is highly efficient and accurate due to its advanced microprocessor technology- The ZT-2 Tests for inorganic materials commonly found in drinking water- The ZT-2 May be used on all types of water except hot water- The ZT-2 Is an economy model... more

    $45.61 $14.99

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    Digital TDS Meter Water Quality Tester with Carrying Case

    Digital TDS Meter Water Quality Tester with Carrying Case

    Free Shipping on Over 500K Items!

    TDS stand for Total dissolved solids, which includes Salt, metal or mineral in the water. A TDS meter is an easy to use hand-held digital meter to instantly check your overall water quality. It allows you to stay on top of your drinking water quality... more

    $18.99

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    Handheld TDS 3 Meter Calibration Solution 342 PPM

    Handheld TDS 3 Meter Calibration Solution 342 PPM

    Check the function of your RO membrane and DI resin with this handy TDS3 (total dissolved solids) meter. Includes batteries. Comes precalibrated. Hold Function saves measurements for convenient reading and recording. Auto-off function. Measurement... more

    $8.99

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    HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz/89mL

    HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz/89mL

    HM Digital C342 TDS and EC Calibration Solution - 342 ppm NaCl 3oz/89mL - Single. HM Digital C342 TDS and EC Calibration Solution 342ppm NaCl HM Digital C342 TDS and EC Calibration Solution 342ppm NaCl For optimal performance re-calibrate your meters... more

    $4.95

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    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml

    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml

    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml - Single. HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm For optimal performance re-calibrate your meters periodically or if testing TDS or conductivity levels... more

    $4.95

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    HM Digital 1000ppm Calibration Solution

    HM Digital 1000ppm Calibration Solution

    "For optimal performance, re-calibrate your meters periodically FEATURES: NaCl calibration solution 1000 ppm., Comes in lightweight HDPE plastic bottles., Sealed with a coated foam liner., SPECIFICATIONS: NaCl solution, 1000 ppm, 3 oz. bottles (88.7... more

    $21.22

    FREE shipping

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    HM Com 100 and PH 200

    HM Com 100 and PH 200

    We are combining the Com 100 with the HM digital pH 200 meter. You get two of the finest handheld meters for one low price.Not the usual retail of $139.95 for both. As a package just $132.95. That's right you get both for only $132.95. Big savings over... more

    $98.60

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    Milwaukee pH - EC - TDS KIT

    Milwaukee pH - EC - TDS KIT

    " Milwaukee Instruments AG900 provides instant readings of the three most important factors in efficient plant production: pH, EC, or TDS. The AG900 kit comes with an SM802 hand held microprocessor, calibration solution, measuring cup for soil testing,... more

    $240.40

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    HM Digital PH-BUF pH Buffer Solution Variety Pack - 2761

    HM Digital PH-BUF pH Buffer Solution Variety Pack - 2761

    HM Digital PH-BUF pH Buffer Solution Variety Pack is simple to use, economical, and powder form has an indefinite shelf life. Mix each packet of powder with distilled or deionized water. HM Digital PH-BUF pH Buffer Solution Variety Pack includes 3... more

    $13.81 $12.55

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    EC/TDS HydroTester COM-80

    EC/TDS HydroTester COM-80

    Economical, handheld meter puts fast and accurate EC/TDS measurement in the palm of your hand. The HM Digital EC/TDS HydroTester COM-80 is a great choice for hobbyists looking for a sensibly priced electronic tester that measures EC (Electrical... more

    $39.95

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    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml - Case of 24

    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml - Case of 24

    HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm 3oz/89ml - Case of 24 C1000:24PK. HM Digital C1000 TDS and EC Calibration NaCl Solution - 1000 ppm For optimal performance re-calibrate your meters periodically or if testing TDS or... more

    $104.40

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