BlueLab Waterproof Pens

The Bluelab pH & PPM Pen provides a compact, quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients.

The PH pen features:     
    * Measures pH and temperature
    * Selectable units for è_C & è_F
    * Backlit LCD display
    * Double junction probe (not replaceable)
    * Successful calibration indicator
    * Hold function
    * Low battery warning
    * Fully waterproof
    * Auto off function
    * Automatic temperature compensation

The PPM pen features:
    * Measures conductivity and temperature
    * Selectable units for conductivity and temperature
    * Backlit LCD display
    * Calibration optional
    * Successful calibration indicator
    * Hold function
    * Low battery warning
    * Fully waterproof
    * Auto off function
    * Automatic temperature compensation

Both come with a 1 year warranty!