Groline | Hanna Instruments

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Get growing with the best
GroLine hydroponic and soil meters around

Whether you are a commercial or at-home grower, testing is the key to your success. Easily control growth parameters and ensure the right nutrient balance for your plants with GroLine. Start optimizing and generating larger yields in no time.

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Meet the meter that does it all

GroLine pH/EC/TDS Meter

Grow better than your competition with this customer favorite. This portable meter is perfect for testing hydroponic nutrient solutions! Fast and accurate results for pH, EC/TDS, and temperature are now at your fingertips.

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Keep plants safe 24/7

GroLine Hydroponic Monitor

Always be there for your grow and monitor nutrients round-the-clock. Achieve continuous pH, EC/TDS, and temperature readings. Maximize your nutrient solution and know exactly what your plants need to thrive.

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Measure hydroponic nutrients for optimal growth

You've probably heard this before, but we'll say it again, don't underestimate the power of nutrients when it comes to plant health. Enjoy convenient testing with GroLine. Make smarter decisions for your grow operation and deliver nutrients to your plants with precision.

Top Picks for Hydroponic Growers

GroLine Monitor for Hydroponic Nutrients

HI981420-01 GroLine Monitor for Hydroponic Nutrients$479.99

GroLine Nutrient Tester

HI98330 GroLine Nutrient Tester $99.99

GroLine Monitor for Hydroponic Nutrients with Inline Probe

HI981421-01 GroLine Monitor for Hydroponic Nutrients with Inline Probe$499.99
$585.00

GroLine Nutrient Dosing System

HI981413 GroLine Nutrient Dosing System$499.99

GroLine Waterproof Portable pH/EC/TDS Meter

HI9814 GroLine Waterproof Portable pH/EC/TDS Meter $299.99
$324.95

GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester

HI98131 GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester$214.99
$259.95

GroLine Waterproof EC/TDS (ppm) Tester

HI98318U GroLine Waterproof EC/TDS (ppm) Tester$109.99

GroLine Hydroponics pH Tester

HI98115 GroLine Hydroponics pH Tester$59.99
$70.00

GroLine pH Dosing System

HI981412 GroLine pH Dosing System$499.99

GroLine Waterproof Hydroponic pH Tester

HI98118U GroLine Waterproof Hydroponic pH Tester$99.99

Test soil at the root zone and boost crop yields

Growers, it's no secret that healthy plants start from the ground up. Understanding soil nutrients is critical, so let's get to know your plants on a deeper level. Easily take direct measurements in soil or other growth mediums anywhere using our GroLine testers and meters.

Soil Testing Essentials

HALO2 GroLine Wireless pH Tester for Soil

HI9810302 HALO2 GroLine Wireless pH Tester for Soil $159.99
$175.00

Direct Soil Measurement pH Portable Meter

HI99121 Direct Soil Measurement pH Portable Meter $559.99

pH/EC/TDS/Temperature meter with CAL Check

HI9813-61 pH/EC/TDS/Temperature meter with CAL Check$279.99

pH/EC/TDS/Temperature Portable Meter, range: pH 0.0 to 14.0 pH EC 0.00 to 4.00 mS/cm TDS 0 to 1999 ppm (mg/L)

HI9813-51 pH/EC/TDS/Temperature Portable Meter, range: pH 0.0 to 14.0 pH EC 0.00 to 4.00 mS/cm TDS 0 to 1999 ppm (mg/L)$269.99

Soil Test™ Direct Soil Conductivity Tester

HI98331 Soil Test™ Direct Soil Conductivity Tester $159.99

GroLine Professional Portable Soil pH Meter

HI98168 GroLine Professional Portable Soil pH Meter$799.99

Growers also like to test with

Multiparameter pH/EC/TDS/Salinity/DO/Pressure/ Temperature Waterproof Meter

HI98194 Multiparameter pH/EC/TDS/Salinity/DO/Pressure/ Temperature Waterproof Meter $1,699.99

Multiparameter pH/ISE/EC/DO/Turbidity Waterproof Meter with optional GPS

HI9829 Multiparameter pH/ISE/EC/DO/Turbidity Waterproof Meter with optional GPS$3,399.99

Low Range pH/Conductivity/TDS Tester

HI98129 Low Range pH/Conductivity/TDS Tester$209.99

Direct Soil Measurement pH Portable Meter

HI99121 Direct Soil Measurement pH Portable Meter$559.99

Nutrient Analysis Photometer

HI83325-01 Nutrient Analysis Photometer$939.99

pH/EC/TDS/Temperature meter with CAL Check

HI9813-61 pH/EC/TDS/Temperature meter with CAL Check $279.99

Suction Lysimeter for Root Level Soil Monitoring

HI83900 Suction Lysimeter for Root Level Soil Monitoring$69.99

Mini-Fertilizer Injection System

HI2500 Mini-Fertilizer Injection System

pH/EC/TDS/Temperature Portable Meter, range: pH 0.0 to 14.0 pH EC 0.00 to 4.00 mS/cm TDS 0 to 1999 ppm (mg/L)

HI9813-51 pH/EC/TDS/Temperature Portable Meter, range: pH 0.0 to 14.0 pH EC 0.00 to 4.00 mS/cm TDS 0 to 1999 ppm (mg/L) $269.99

DiST®4 Waterproof EC Tester (0.00-20.00 mS/cm)

HI98304U DiST®4 Waterproof EC Tester (0.00-20.00 mS/cm)$79.99

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