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Understand Your Nutrient Solution

Measuring different aspects of your growing medium can tell you exactly what your plants need and what they are missing. Ensure the perfect nutrient balance for a better yield with pH and conductivity testers.

Direct Soil Conductivity Tester

Specifically designed to directly measure soil conductivity (EC) and temperature with steel penetration electrode.

GroLine Combo Tester

The HI98131 Hydroponic Waterproof Pocket Meter is a slim, lightweight meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature.

HI9814_F-720x720-a0ef8046-1293-4221-90c6-eb9c792c73e4

GroLine Waterproof Combo Meter

One combined, pre-amplified pH, EC, and TDS (ppm) probe for hassle-free measurements. Get the HI9814K Kit, complete with everything you need for better testing.

Nutrient Analysis Photometer

Measure essential nutrients in your fertilizer enriched solutions right on the spot.

Sophisticated

Features an innovative optical design to ensure consistency between measurements.

Advanced

To save valuable laboratory benchtop space, the HI83303 doubles as a professional pH meter with its digital pH/temperature electrode input.

Tailored

The HI83325 is designed for the agriculture industry to measure nutrients including ammonia, nitrate, and phosphorus.

Monitor like a scientist. Grow like a professional.

HI981421-01 GroLine Hydroponic Nutrients Monitor for pH, EC, TDS, and Temperature $499.99

24-hour continuous pH, EC/TDS, and temperature monitoring of your nutrient solution.

Our GroLine Monitor is made by growers and scientists alike who are committed to helping you take your growing operation to the next level. Choose the GroLine Monitor that works best for your testing environment: