Collection: Meters & Solutions

In this collection, you will find every product related to water analysis instruments available on our website at the best price!

These instruments are used to check if your nutrient solution has the correct pH (between 5.5 and 6.5 for most plants), and the Total Dissolved Solids (TDS) of a solution, i.e. the “concentration” (references are on the feeding schedule of your nutrient line), they can prevent significant stresses and unwanted alterations in the plant’s growth!

Some of the more advanced water analysis instruments measure more than just the pH and TDS of a solution.


Be sure to clean and store your instruments properly to preserve their lifespan!

67 products
  • Bluelab Calibration Solution
    Vendor
    Bluelab
    Regular price
    from $2.99
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    from $2.99
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  • Cyco pH Solutions
    Cyco pH Solutions - Nutrients
    Vendor
    Cyco
    Regular price
    from $16.99
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    from $16.99
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  • Alfred pH Test Strips
    Vendor
    Alfred Hydroponic
    Regular price
    $5.99
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    $5.99
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  • Advanced Nutrients pH Solutions
    Vendor
    Advanced Nutrients
    Regular price
    from $13.99
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    from $13.99
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  • Green Planet Nutrients pH Solutions
    Green Planet Nutrients pH Solutions - Nutrients
    Vendor
    GreenPlanet
    Regular price
    from $17.99
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    from $17.99
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  • General Hydroponics pH Up & Down
    Vendor
    General Hydroponics
    Regular price
    from $9.99
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    from $9.99
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  • Hydrofarm 3 Way Soil Meter
    Vendor
    Hydrofarm
    Regular price
    $13.99
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    $13.99
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  • Bluelab pH Probe KCI Storage Solution
    Vendor
    Bluelab
    Regular price
    from $15.99
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    from $15.99
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  • Cyco Calibration Solutions
    Vendor
    Cyco
    Regular price
    $9.99
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    $9.99
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  • TNB Naturals pH Up & Down
    Vendor
    TNB Naturals
    Regular price
    $17.99
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    $17.99
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  • HM Digital pH/Temp Hydro Tester (PH-80)
    Vendor
    HM Digital
    Regular price
    $67.99
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    $67.99
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  • Alfred Digital pH/Temperature & EC/TDS/Temperature Testers
    Alfred Digital pH Temperature EC TDS Water Meters
    Vendor
    Alfred Hydroponic
    Regular price
    from $47.99
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    from $47.99
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  • Emerald Harvest pH Up & Down
    Emerald Harvest pH Solutions (pH Up And Down) Bundle
    Vendor
    Emerald Harvest
    Regular price
    from $21.99
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    from $21.99
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  • Bluelab pH Pen
    Vendor
    Bluelab
    Regular price
    $169.99
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    $169.99
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  • General Hydroponics pH Control Kit
    Vendor
    General Hydroponics
    Regular price
    $38.99
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    $38.99
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  • General Hydroponics pH Test Kit 1oz
    Vendor
    General Hydroponics
    Regular price
    $15.99
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    $15.99
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  • Bluelab Probe Care Kits
    Vendor
    Bluelab
    Regular price
    from $20.99
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    from $20.99
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  • Bluelab Conductivity Pen (EC or PPM)
    Vendor
    Bluelab
    Regular price
    $129.99
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    $129.99
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  • Luster Leaf Soil Testers
    Vendor
    Luster Leaf
    Regular price
    from $11.99
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    from $11.99
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  • HM Digital ph/EC/TDS Assorted Solutions (ASP-20)
    Vendor
    HM Digital
    Regular price
    from $2.99
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    from $2.99
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  • Bluelab 2.77 EC Conductivity Standard Solution
    Vendor
    Bluelab
    Regular price
    from $14.99
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    from $14.99
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  • Bluelab TDS Truncheon Meter Original & Commercial
    Bluelab Truncheon Nutrient Meter
    Vendor
    Bluelab
    Regular price
    $199.99
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    $199.99
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  • House & Garden pH Osmosis Stabilizer
    Vendor
    House & Garden
    Regular price
    $28.99
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    $28.99
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  • HM Digital pH/ORP Electrode Storage Solution
    Vendor
    HM Digital
    Regular price
    $11.99
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    $11.99
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  • Bluelab Combo Meter pH/EC/CF/TDS/Temp
    Vendor
    Blue Lab
    Regular price
    from $109.99
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    from $109.99
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  • Holland Greenhouse Moisture and pH Meter
    Vendor
    Holland Greenhouse
    Regular price
    $13.99
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    $13.99
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  • HM Digital EC/TDS Hydro Tester (COM-80)
    hm digital com-80 tds ec meter
    Vendor
    HM Digital
    Regular price
    $46.99
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    $46.99
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  • Bluelab® pH Controller
    Vendor
    Bluelab
    Regular price
    $799.99
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    $799.99
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  • Bluelab® Guardian Monitor
    Vendor
    Bluelab
    Regular price
    $559.99
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    $559.99
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  • HM Digital TDS NaCl Calibration Solution
    Vendor
    HM Digital
    Regular price
    $9.99
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    $9.99
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  • HM Digital Handheld TDS/Temperature Meter (TDS-3) (w/ Carrying Case)
    hm digital tds and temperature meter tds-3 with carrying case
    Vendor
    HM Digital
    Regular price
    $27.99
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    $27.99
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  • Hanna Intruments GroLine pH Tester (HI98115)
    Hanna Intruments GroLine pH Tester (HI98115)
    Vendor
    Hanna Instruments
    Regular price
    from $49.99
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    from $49.99
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  • [HI98311] HANNA DiST5 EC/TDS/Temperature Tester (0-3999 µS/cm)
    Vendor
    Hanna Instruments
    Regular price
    $179.99
    Sale price
    $179.99
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  • [HI98130] HANNA Combo pH/EC/TDS Tester (High Range)
    Vendor
    Hanna Instruments
    Regular price
    $259.99
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    $259.99
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  • [HI981401N] HANNA Gro'Check pH Meter with LCD
    Vendor
    Hanna Instruments
    Regular price
    $159.99
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    $159.99
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  • HANNA Gro Line Quick Cal Check (460 mL)
    Vendor
    Hanna Instruments
    Regular price
    $17.99
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    $17.99
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  • [HI98129] HANNA Combo pH/EC/TDS Tester (Low Range)
    Vendor
    Hanna Instruments
    Regular price
    $219.99
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    $219.99
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  • [MTNKIT] HANNA Cleaning & Storage Solutions (230 mL)
    Vendor
    Hanna Instruments
    Regular price
    $30.99
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    $30.99
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  • [HI98127] HANNA pHep4 (pH & Temp Tester) RED
    Vendor
    Hanna Instruments
    Regular price
    $129.99
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    $129.99
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  • [HI98128] HANNA pHep5 (pH & Temp Tester) RED
    Vendor
    Hanna Instruments
    Regular price
    $149.99
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    $149.99
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