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Reference Solutions

To work correctly, your testing equipment must be perfectly calibrated, kept clean and stored properly. These professional-quality reference solutions assure accurate testing results and long equipment life for your EC, TDS and pH meters.

  • Bluelab Calibration Solutions 1

    Bluelab Calibration Solutions

    A must in every grower's toolbox! Bluelab Calibration Solutions are essential for the calibration of Bluelab meters and monitors. They ...

    $11.50
  • Conductivity Probe Cleaning Kit 1

    Conductivity Probe Cleaning Kit

    The instrument is only as accurate as the probe is clean! Probe cleaning is one of the most important parts ...

    $21.00
  • Electrode Cleaning Solution (HI 7061) 1

    Electrode Cleaning Solution (HI 7061)

    General Purpose Cleaning. To ensure accurate measurements clean the liquid junction of your electrodes once a day or at least ...

    $17.95
  • Electrode Storage Solution (HI 70300) 1

    Electrode Storage Solution (HI 70300)

    For pH and ORP electrodes. To ensure fast response times and minimize clogging, always keep the glass bulb and the ...

    $17.50
  • Genesis pH Calibration Kit 1

    Genesis pH Calibration Kit

    Suitable for all pH pens and meters. This pH Calibration Kit includes one eight-ounce bottle each of pH buffer 4.01 ...

    $17.50
  • HANNA Calibration Packets

    HANNA Calibration Packets (20 ml)

    Made from established formulas, HANNA's Calibration Solutions are standardized against NIST reference solutions. Before taking any measurement make sure your ...

    $1.50
  • HANNA TDS Solution 1

    HANNA TDS Solution

    Produced with high-quality potassium chloride in various concentrations, HANNA TDS Solutions ensure maximum accuracy for conductivity meters and probes. They ...

    $12.95
  • pH 4

    pH 4.01 Calibration Solution

    General Hydroponics Calibration Solution is used to adjust your pH meter to 4.01. Easy to use, just dip your electrode ...

    $6.95
  • pH 7

    pH 7.0 Calibration Solution

    General Hydroponics pH 7.0 Calibration Solution is easy to use! Just dip your electrode into a small amount of the ...

    $6.95
  • PH Buffer Solution (HI 7007 & HI 7004) 1

    PH Buffer Solution (HI 7007 & HI 7004)

    HANNA manufactures quality pH buffer solutions for a variety of applications. ALL are standardized against NIST reference solutions. Available separately in ...

    $17.50
  • pH Probe Cleaning & Calibration Kit 1

    pH Probe Cleaning & Calibration Kit

    The instrument is only as accurate as the probe is clean! Probe cleaning is one of the most important parts ...

    $34.50
  • TDS Calibration Solution 1

    TDS Calibration Solution

    Easy to use, just dip your electrode into a small amount of the buffer and adjust.

    $19.95