The pH Hydrotester provides a fast and accurate digital readout of pH in a solution. Keeping the pH in the right range is essential for healthy plants. Key benefits of the pH hydrotester pen are:

  • Measures pH and temperature of nutrient solution
  • Range: 0.0 - 14.0 pH, 1-80°C
  • Includes batteries, electrode storage solution, pH 7.0 buffer and translucent cap

Why should I check pH?

Without the correct pH, nutrients cannot be absorbed by a plant's roots. This leads to nutrient lockout, and deficiencies shown on the plant's leaves. The further the pH is out, the more unhealthy a plant will be. A pH pen is a quick and easy way to make sure your plants stay healthy. Read more in our article here. For a complete list of pH levels for different plants check our table here.

pH Hydrotester Pen Features

The major benefit of this pH pen is the fast and accurate readout. It literally takes 1 second to update and give your current pH reading. At Aqua Gardening, this is the pen we rely on the most - and we haven't had one returned unlike other cheaper units available. Other features include:

  • Water resistant
  • Hold function - press to hold the current reading on screen
  • Resolution to 0.1 pH
  • Automatic compensation for temperature
  • Auto-off in 5 minutes
  • Calibrate at 4.0, 7.0 or 10.0 pH
  • Battery Life - approx 2 years. Uses 3 x 1.5V batteries ("357A")
  • Weight 53.9g
  • Dimensions 15.3 x 3.2 x 1.8 cm

Made by HM: a trusted name in test and measurement.


SKU 125093
Barcode # 891144000175
Brand HM
Shipping Weight 0.3800kg
Shipping Width 0.150m
Shipping Height 0.040m
Shipping Length 0.250m
Shipping Cubic 0.001500000m3
Type Test and Measurement

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As long as your delivery address is in our free shipping zone, and your order is above the minimum value for free shipping, your shipping will be free. For full details see our shipping information here.