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HM DIgital

HM Digital PH-80 pH/Temperature Meter

HM Digital PH-80 pH/Temperature Meter


Regular price $46.50 USD
Regular price Sale price $46.50 USD
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The HM Digital PH-80 pH/Temperature Meter is a compact and precise instrument designed for measuring both pH levels and temperature in various liquid applications. This digital meter is an essential tool for hydroponics, aquariums, water quality testing, and other situations where accurate pH and temperature monitoring is crucial. With its user-friendly design and reliable performance, it’s a valuable addition to the toolkit of hobbyists and professionals alike.

Key Features:

1. Dual Measurement: The PH-80 is capable of measuring both pH levels and temperature, providing comprehensive insights into liquid conditions.

2. High Accuracy: The meter offers exceptional accuracy, ensuring reliable readings for pH levels between 0 and 14 and temperature between 0 and 80 degrees Celsius (32-176 degrees Fahrenheit).

3. Auto Calibration: Users can easily calibrate the meter using standard pH calibration solutions. Calibration helps maintain accuracy over time.

4.Digital Display: The large, easy-to-read LCD screen displays both pH and temperature readings simultaneously, making it simple to track both parameters at a glance.

5. Automatic Temperature Compensation (ATC): The PH-80 is equipped with ATC, which adjusts pH readings based on temperature fluctuations, ensuring precise results.

6. Pocket-Sized: Its compact size and included carrying case make it a portable and convenient tool for on-the-go measurements.

7. Long Battery Life: Powered by two 3V CR2032 button cell batteries, the meter has an extended battery life to minimize downtime.

8. Economical: A cost-effective solution for those needing accurate pH and temperature measurements without investing in more complex laboratory equipment.


• Hydroponics: Essential for monitoring and maintaining the pH levels necessary for optimal nutrient uptake by plants.

• Aquariums: Enables aquarium enthusiasts to track and control water conditions to ensure the health of aquatic life.

• Water Quality Testing: Valuable for testing the pH of drinking water, pools, and other water sources.
Laboratories: Suitable for basic pH and temperature measurements in educational or research laboratories.

How to Use:

• Remove the protective cap from the pH electrode.
• Immerse the electrode in the liquid you want to test, ensuring it’s fully submerged.
• Wait for the reading to stabilize, typically within a minute.
• Record both the pH and temperature readings displayed on the screen.
• Clean and rinse the electrode thoroughly after use to maintain accuracy.
• The HM Digital PH-80 pH/Temperature Meter is an indispensable tool for those who require accurate pH and temperature measurements. Whether you’re a hydroponics enthusiast, aquarium keeper, or need to assess water quality, this user-friendly and reliable meter simplifies the process of monitoring essential liquid parameters.

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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.