Bluelab pH Pen

The BlueLab pH pen is a hardy, compact, and accurate pH and temperature pen for using in nutrient solution. Use the pH pen to quickly and accurately know if your solution is too acidic or alkaline, or too hot or cold. Designed for everyday use, the Bluelab pH Pen helps you to keep your plants in the  optimal pH and temperature range so that your plants can thrive.
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Description

Features:
  • Compact handheld design for convenient use
  • Bright, easy-to-read backlit display
  • Double-junction pH probe for accurate measurements
  • Simple 2-point pH calibration with a 30-day reminder
  • Read temperature in °C or °F
  • Waterproof and floats in any solution
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