If you already own a soil pH tester, you might wonder whether you can also use it to check the pH of your water. After all, pH is pH — right?
While the basic concept of measuring pH remains the same, the instruments used for soil and water are designed quite differently. Using a soil pH tester in water may produce inaccurate results, and in some cases, it could even damage the meter or shorten its lifespan.
Let’s explore why, and how you can get the most accurate and efficient results by using the right equipment, including portable multiparameter meters that measure more than just pH.
Soil vs. Water pH Testing: What’s the Difference?
Soil pH meters are specifically built to measure the pH in dense or semi-solid materials. Their probes are often rugged and designed to be inserted directly into moist soil or soil slurries. In contrast, water pH meters are optimized for use in clear, liquid samples and typically offer greater precision and faster response times in such conditions.
Key differences include:
Can You Use a Soil pH Meter in Water?
You can, but you shouldn’t. Most soil pH testers are not designed for use in pure water or nutrient solutions. You may get a reading, but it will likely be inaccurate or unstable.
Also, immersing a soil probe in water long-term may damage the sensor, especially if the probe is not properly cleaned or maintained.
If you’re serious about getting accurate data for plant health, irrigation planning, or water quality, use an instrument made for the specific medium you’re testing.
The Smarter Option: Multiparameter Meters
Instead of switching between several single-function meters, multiparameter meters offer a smart, cost-effective solution — especially for growers, lab technicians, and environmental testers.
These meters can measure:
Who Benefits from Multiparameter Meters?
Use the Right Tool for the Job
While it’s tempting to use a soil pH tester for everything, it’s not designed for accurate readings in water. For reliable results:
With trusted instruments from Hanna Instruments, you can ensure you’re collecting accurate data, protecting your equipment, and supporting optimal plant and water health.
For Soil Testing: HI981030 GroLine Soil pH Tester
Specifically designed for soil, featuring a rugged conical probe and open junction for better performance in direct soil or slurries.
For Water Testing: HI98107 pHep® pH Tester
Reliable and portable, perfect for drinking water, aquariums, and general pH checks.
For Both Soil & Water – Multiparameter Meters:
HI9814 GroLine Waterproof pH/EC/TDS/°C Meter: A professional handheld solution ideal for hydroponics, irrigation, and nutrient management. It comes with a multiparameter probe that handles liquid samples with ease.
HI98194 Professional Waterproof Multiparameter Meter: Designed for environmental monitoring, this advanced device measures up to 12 parameters including DO, turbidity, and ammonium — ideal for water treatment, aquaculture, and research.
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