Introducing the Hannah GroLine EC Tester

The Hanna GroLine EC Tester is a lab-grade meter that measures nutrient strength with pinpoint accuracy. Hanna Instruments, the manufacturers behind it, are the most distinguished company in the field, with a long history of creating game-changing meters that have set the standard for the scientific world. Their GroLine range is designed specifically for horticulture, but it’s part of a larger catalogue of scientific instruments that stretches back decades.

  • Over 40 years ago, Hanna was the very first company to develop a single-probe portable conductivity meter.
  • Back in 1984, they developed the first handheld pH meter that was microprocessor-based.
  • And in 1985, they created the first pH meter with built-in compensative temperature sensors to improve accuracy. This feature has gone on to become the industry standard and is incorporated into an array of meters from other manufacturers.
  • In the year 2000, Hanna pushed things even further by creating a pocket tester that was capable of checking pH, EC and temperature at the same time – again, the first of its kind, and something that has been copied countless times.

These are just a few of Hanna’s many achievements. With this kind of pedigree, you’d naturally expect big things from the GroLine EC Tester, and it doesn’t disappoint. It’s lightweight and ergonomically designed, making it easy to carry around and use. As you’d expect, the build quality is exceptional, and it feels great in the hand. Naturally, it’s also waterproof, with a clear, easy-to-read display.

However, the biggest draw for the GroLine lies in its pinpoint accuracy. Most of the go-to meters in the hydroponics industry display conductivity readings to one decimal place, which gets the job done fine. But with two decimal places, the GroLine delivers ten times the precision. This makes life much easier when you’re administering nutrients because you can see tiny increases in concentration levels as you add small quantities of feed.

The GroLine also has a wider range than a lot of other equipment out there, reading from zero up to an EC of 6.0. This is especially useful when you’re running nutrients that are designed to be administered at higher concentrations, like Athena, which is currently flying off the shelves.

It’s not just accurate, it stays accurate - and it’s quick and easy to calibrate, with single-point calibration. Just invest in a bottle of Hanna’s EC 1.41 EC solution and you’re good to go. 

Conductivity Range: 0.00 to 6.00 mS/cm
Conductivity Resolution: 0.01mS/cm
Conductivity Accuracy: ±2%F.S.
TDS Range: 0 to 3000 ppm (500CF); 0 TO 3999 PPM (700CF)
TDS Resolution: 10 ppm (mg/L)
TDS Accuracy: ±2%F.S.
Temperature Range: 0.0 to 50.0°C
Temperature Resolution: 0.1°C
Temperature Accuracy: ±0.5°C
Temperature Compensation: automatic from 0 to 50°C
TDS Conversion Factor: 0.5 (500ppm) or 0.7 (700 ppm)
Environment: 0 to 50°C; RH max 100%
Dimensions: 160 x 40 x 17mm
Weight: 75g

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