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HM DIgital

HM Digital Waterproof pH Meter

HM Digital Waterproof pH Meter


Regular price $108.07 USD
Regular price Sale price $108.07 USD
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The HM Digital Waterproof pH Meter is a robust and precise tool for measuring the pH levels of liquids in various applications. Designed for ease of use, durability, and accuracy, it's an essential instrument for hydroponics, aquaculture, laboratories, swimming pools, and other situations where pH control is critical.

Key Features:

Waterproof Design: This pH meter is constructed to withstand exposure to moisture and water, making it suitable for both indoor and outdoor use. Its waterproof housing ensures long-lasting performance and reliability even in wet conditions.
High Accuracy: The device is equipped with a reliable and accurate pH sensor that provides precise readings. It offers a pH measurement range of 0-14, making it versatile for various applications.
Auto Calibration: The pH meter features an automatic calibration function, which simplifies the setup process and ensures accurate readings. It also has a calibration reminder to maintain measurement integrity.
Clear LCD Display: The large, easy-to-read LCD screen displays pH readings clearly, making it simple to interpret your results. The screen is backlit for convenient use in low-light environments.
Long Battery Life: With its low power consumption, the pH meter has an extended battery life, reducing the need for frequent battery replacement.
Portable and Compact: The compact design and included carrying case make this pH meter highly portable, allowing you to take measurements in various locations.
Multiple Applications: This pH meter is versatile, suitable for a wide range of applications such as hydroponics, aquaculture, swimming pools, laboratories, and any situation where precise pH measurement is essential.

How to Use:

Remove the protective cap.
Turn on the pH meter and immerse the electrode into the liquid you want to measure.
Gently stir the solution to ensure an accurate reading.
Wait for the reading to stabilize; this usually takes a few seconds.
Record the pH value from the digital display.
After use, rinse the electrode with clean water and replace the protective cap.


Periodically, the pH meter should be calibrated to maintain its accuracy. Follow the included instructions for calibration procedures, which typically involve using calibration solutions with known pH values.

The HM Digital Waterproof pH Meter is your reliable companion for accurate pH measurements. Whether you're maintaining a hydroponic system, ensuring water quality in your swimming pool, or conducting experiments in the lab, this pH meter simplifies the process and provides dependable results.

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What is Hydroponics?

Hydroponics is the science of growing plants without soil. The plants thrive on the nutrient-water solution alone. The growing medium merely acts as a support for the plants and their root systems while the solution passes freely. The growing medium, if any, is totally inert.

What types of plants grow best hydroponically?

Anything can be grown hydroponically, but some plants prove to be more space efficient. Some plants we suggest are tomatoes, sweet peppers, hot chilies, lettuce, spinach, squash, cucumbers, broccoli, beans, snow peas, herbs and flowers of all types.

Can you REALLY get better yields/quicker growth?

Absolutely. The plants, when receiving everything they need, tend to be healthier, faster growing and generally more productive. You can expect 30% faster growth with many crops.

What are the watering cycle timelines hydroponic systems?

Once the reservoir is filled with nutrients, it is time to put your hydro system to work! The ease of hydroponics is automation – automation is achieved by putting the pump on a timer according to your watering needs. The watering cycle depends on growth stage, growing medium and hydroponic system. In an ebb and flow or drip system with rockwool as the medium, seedlings, clones and plants in the early vegetative stage require watering only once a day for 15-30 minutes (twice a day for higher temps). Mature, flowering and fruiting plants require a heavier feed and can be fed once a day for 30 minutes (twice a day for higher temps). Typically soiless mixes and coco fiber can be watered for about 15 minutes twice a day, and can be adjusted for heavier feeding during the flowering and fruiting stage or higher temps. ViaStone, Hydroton, Grow Rocks, and Silicate mediums need to be watered more frequently – a constant drip for drip systems, and about 15-30 minutes every 3 hours for ebb and flow systems and can be adjusted for heavier feeding during the flowering and fruiting stage or higher temps. Aeroponic systems require frequent watering cycles; 30-60 seconds every few minutes or a constant spray.

What do I need to test pH? How do I test pH?

pH has a range from 0 (acidic) – 14 (alkaline), with 7 being neutral. A proper hydroponic pH range is between 5.5 to 6.2 for most hydroponic crops. For specific crop pH, check out our Plant Guide. pH must remain within the proper range for good plant health, disease resistance, and proper nutrient uptake. pH is maintained by adding pH Up and pH Down to the nutrient solution. For more information, see the Testssection of our site.

How will the flavor compare to my outdoor grown, organic produce?

The taste may be even better! This is simply due to the fact that the hydroponically grown plants are getting everything they need, when they need it. Don’t be fooled by “hot house” produce grown commercially. The grower’s primary concern is shipability and storage, not flavor. When you grow your own vegetables at home, you can expect nothing less than excellent results. Plus, hydroponically grown produce has the added benefit of a longer shelf life.