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  • HM TDS-3 Meter with Carrying Case 10-Pack

    (TDS-3)

    HM TDS-3 Meter is ideal for both residential and commercial applications including but not limited to water purification, waste-water regulation, aquaculture, hydroponics, and residential RO applications. Measurement range is 0-9990 ppm. TDS Meters Are Used To: Check the performance of your water…

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    HM TDS-3 Meter with...
    Our Price: $ 22.20
    Retail:$36.99
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    $14.79 (40%)
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    Discontinued Product. Read Description for Options.
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  • HM TDS-4 Pocket Size TDS Meter, TDS4 10 Pack - 10-Pack

    (TDS4)

    The HM TDS-4 Meter will monitor the TDS (Total dissolved solids) levels for drinking water, water filters, hydroponics, Aquariums, Food and Coffee, Pools and Spas and residential RO applications. Measurement range is 0-9990 ppm. TDS Meters Are Used To: Check the performance of your water filter…

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    HM TDS-4 Pocket Size...
    Our Price: $ 17.95
    Retail:$34.99
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    $17.04 (49%)
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  • HM Digital pH Buffer Solution Variety Pack

    (pH Buffer)

    The pH Buffer Solution Variety Pack from HM Digital is lightweight, economically priced and has an indefinite shelf life. Easy to use. Preparation directions are included directly on the bottle. Includes 3 packets of 4.0 pH, 6 packets of 7.0 pH, and 3 packets of 10.01 pH pH Buffer Solution Variety…

    HM Digital pH Buffer...
    Our Price: $ 9.95
    Retail:$11.99
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    $2.04 (17%)
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    Discontinued Product. Read Description for Options.
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  • HM Digital AquaPro AP-2 Water Quality Tester - EC 12-Pack

    (AP-2)

    The HM Digital AquaPro AP-2 Water Quality Tester is a hand-held digital water quality tester which is used to test the electrical conductivity (EC) of water. It also tests the temperature of water, and features Automatic Temperature Compensation (ATC). Useful for both consumers and hobbyists, it…

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    HM Digital AquaPro...
    Our Price: $ 25.79
    Retail:$42.99
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    $17.20 (40%)
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  • HM Digital AquaPro AP-1 Water Quality Tester - TDS 10-Pack

    (AP-1)

    The HM Digital AquaPro AP-1 Water Quality Tester is a hand-held digital water quality tester which is used to test the amount of total dissolved solids (TDS) and other impurities in your water supply. Useful for both consumers and hobbyists, it can be used to test your drinking water, pools, spas,…

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    HM Digital AquaPro...
    Our Price: $ 25.79
    Retail:$42.99
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    $17.20 (40%)
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  • HM Digital PTDS-4TM Pocket Size TDS Meter w/ Temp 10-Pack

    (TDS-4TM)

    The HM Digital PTDS-4TM Pocket Size TDS Meter with Temperature Gauge is a hand held digital water quality tester which is used to test the amount of total dissolved solids (TDS) and other impurities in water. This pocket size HM Digital water test TDS meter is the smallest and lightest TDS meter…

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    HM Digital PTDS-4TM...
    Our Price: $ 22.20
    Retail:$49.99
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    $27.79 (56%)
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  • 357A Replacement 1.5v Button Cell Battery 10-Pack

    (357A)

    The HM Digital 357A 1.5 V Button Cell Battery Replacement is the correct replacement for the following models: HM Digital TDS-3 HM Digital TDS-4 HM Digital TDS-4TM HM Digital TM-1 HM Digital COM-100 HM Digital DM-1 The 357A (1.5v) Button Cell Battery Replacement is a battery replacement for your HM…

    357A Replacement 1...
    Our Price: $ 4.00
    Retail:$5.72
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    $1.72 (30%)
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