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  • Apera Instruments GroStar GS3 EC Pen

    Apera Instruments GroStar GS3 EC Pen

    GroStar Product DocumentsGroStar pH 4 Solution SDSGroStar pH 7 Solution SDSGroStar pH 10 Solution SDSGroStar ORP Storage Solution SDSLab grade instruments designed specifically for growers! The GS3 EC Pen includes: 2.77 EC calibration solution (50 ml...

    $113.99 $89.76
  • Hydrologic DM-2 Industrial Dual TDS Monitor

    Hydrologic DM-2 Industrial Dual TDS Monitor

    DM-2 Industrial Dual TDS MonitorMeasure the untreated water coming in vs. the purified water going out of your reverse osmosis system at any time. This is important in determining when the RO membranes need to be changed.Auto-Off function conserves...

    $82.95 $65.72
  • HM Digital Waterproof EC/TDS/Temp HydroTester

    HM Digital Waterproof EC/TDS/Temp HydroTester

    The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.Features:Measures electrical conductivity...

    $67.95 $40.69
  • HM Digital Waterproof EC/TDS/Temp Combo Meter

    HM Digital Waterproof EC/TDS/Temp Combo Meter

    The COM-100 is a professional level EC/TDS meter at an unbeatable price. Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas,...

    $76.95 $63.00
  • HM Digital HydroMaster HM-500 HM Digital HydroMaster HM-500

    HM Digital HydroMaster HM-500

    HydroMaster Digital tester makes monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you can depend on. Continuous pH/EC/TDS/Temp monitor with rechargeable battery. Portable, wall mount or...

    $359.00 $276.40

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