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The Hanna Waterproof HI98127 pH Meter is a practical, pocket-sized waterproof device. Easy to use, convenient, and durable.

In case of accidentally dropping it into a tank or watering can, it will remain afloat and safe from water damage.

The electrode is replaceable to ensure longer durability of the meter.

Accurate and reliable with the guarantee and quality of Hanna Instruments products.


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The Hanna Waterproof HI98127 is a waterproof pH and temperature meter.

Controlling the pH of irrigation water ensures perfect absorption of all the macro and micronutrients a cannabis plant needs to grow.

If the irrigation water is at 23 degrees Celsius, it meets the optimal concentration of oxygen for growing. However, temperatures below 20 or above 25 can damage your crop.

The Hanna Waterproof HI98127 pH Meter lets you grow with the confidence of properly feeding the plant and avoiding nutrient lockout, one of the major mistakes in cultivation.

Its hermetic casing prevents moisture penetration, extending its lifespan in case of accidents.

It's a precise and user-friendly meter.

Its efficient calibration system allows its adjustment at one or two points with automatic buffer recognition with 5 memorized pH values 4.01/7.01/10.01/6.86 and 9.18.

Readings are automatically compensated, providing accurate measurements at all temperatures. It allows you to view the temperature in Celsius and Fahrenheit.

It includes a low battery indicator that alerts you when it’s time to change the batteries.


  • Waterproof.
  • Automatic shut-off.
  • It has a battery failure prevention system and shows the battery charge percentage upon turning it on.
  • The automatic temperature compensation allows for precise measurements.
  • Increased durability – it's equipped with a renewable fiber junction. Should the electrode wear or become dirty through use, you can pull out the end by 2mm and cut it to extend the electrode's life span.
  • The meter's pH electrode (HI 73127) is interchangeable and easy to replace.
  • It comes with a round steel connector, so you don’t need to connect needles that can bend.

Technical Specifications

  • Measuring range from -2.0 to 16.0 pH.
  • Resolution 0.1.
  • Accuracy (25ºC/77ºF) ±0.1.
  • Automatic calibration at one or two points (pH 4.01/7.01/10.01/6.86/9.18).
  • Operating temperature between -5.0 and 60.0ºC (23.0 to 140.0ºF).
  • Resolution 0.1ºC/0.1ºF.
  • Accuracy (25ºC/77ºF) ±0.5ºC/±1.0ºF.
  • Automatic temperature compensation.
  • 4 1.5V batteries provide 300 hours of continuous use.
  • Automatic shut-off after 8 minutes of inactivity.
  • Weight 100g.

Package Contents

  • HI98127 Meter and the HI73127 pH electrode included with the meter.
  • 2 sachets of pH 4.01 and pH 7.01 buffer solution.
  • 1 sachet of pH and ORP electrode cleaning and storage solution.
  • HI73128 electrode extraction tool.
  • 4 1.5V batteries.
  • Instrument quality certificate.
  • Instruction manual.

La Huerta's Opinion

To extend the life of the electrode, use storage solution. For two-point calibration, you need the PH4 and PH7 calibrator solutions.

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