Showing 193–195 of 195 results

  • Bluelab PPM Pen

    Bluelab PPM Pen

    $94.48 USD

    Bluelab  ppm Pen The ultimate handy solution for measuring conductivity (EC or ppm) and temperature! The Bluelab EC or ppm Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. To feed plants well, we need to know what we’re feeding…

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  • Bluelab pH Pen

    Bluelab pH Pen

    $114.61 USD

    Don’t forget to order your BlueLab calibration Solution ph4 and ph7

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  • Sale! milwaukee PH 600 Pen

    Milwaukee Ph 600

    $30.94 USD
    • Fast, accurate results with digital LCD readout
    • Easy measurement: just place the probe in the sample, gently stir and wait for the reading to stabilize
    • Simple one-point calibration with an easy-to-use trimmer located on the back of the pH tester to protect from accidental splashes
    • Cap to protect the pH sensor and keep it wet when stored upright
    • Low power demand for extended battery life (batteries included)
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