Hanna HI98331 GroLine direct soil EC tester

Hanna HI98331 GroLine Direct Soil EC Tester

The Hanna HI98331 GroLine direct soil EC tester is a compact and easy-to-use direct soil EC tester designed to measure electrical conductivity (EC) and temperature directly in soil, without the need for soil extraction or solution preparation. Built for agriculture, greenhouse cultivation, and soil science, it allows users to quickly assess nutrient availability and salinity levels in real-time.

Features

• Direct Soil Insertion for On-the-Spot Testing
  Unlike traditional methods that require slurry preparation, the HI98331 features a long, stainless-steel probe (114 mm) that can be inserted directly into the soil. As a result, it offers instant insight into soil conductivity and temperature.

• Dual Measurement Capability
  Measures electrical conductivity (0.00 to 4.00 mS/cm) and temperature (0.0 to 50.0°C) simultaneously. Therefore, it provides a more complete view of the growing environment, especially for root-zone monitoring.

• High Accuracy and Resolution
  Offers precision of ±0.05 mS/cm in the 0.00–2.00 range and ±0.30 mS/cm above 2.00 mS/cm, with 0.01 mS/cm resolution. Temperature readings are accurate to ±1°C, ensuring reliable data even in field conditions.

• Automatic Temperature Compensation (ATC)
  Includes built-in temperature compensation with a fixed β coefficient of 2%/°C, which helps correct EC readings for ambient temperature effects. Consequently, you get more accurate and consistent results.

• Simple One-Point Calibration
  Calibrates easily with a single button press, using standard calibration solutions. Moreover, the tester maintains accuracy with minimal effort, making it ideal for routine field testing.

• Portable, Rugged, and Efficient
  Weighing only 74 g and measuring just 196 mm in length, it is compact enough to fit in your pocket or toolkit. In addition, the waterproof housing and replaceable battery make it suitable for rough outdoor use.

• Long Battery Life
  Powered by a CR2032 battery, the HI98331 offers up to 100 hours of continuous use, making it reliable for extended testing periods in the field.

Specifications

• Conductivity Range: 0.00 to 4.00 mS/cm (also displayed as dS/m)

• Temperature Range: 0.0 to 50.0°C

• Resolution:

  • Conductivity: 0.01 mS/cm

  • Temperature: 0.1°C

• Accuracy:

  • EC: ±0.05 mS/cm (0.00–2.00 mS/cm), ±0.30 mS/cm (2.00–4.00 mS/cm)

  • Temperature: ±1°C

• Calibration: Automatic, 1 point

• Temperature Compensation: Automatic, fixed β = 2%/°C

• Probe Length: 114 mm (stainless steel)

• Battery Type: CR2032 lithium-ion

• Battery Life: ~100 hours of continuous use

• Environment: 0 to 50°C

• Dimensions: 196 x 50 x 21 mm

• Weight: 74 g

Applications

• Soil Salinity Management
  Detect excess salts in root zones that may cause nutrient imbalances. In other words, it helps prevent issues like nutrient lockout and poor water uptake.

• Greenhouse and Field Crop Monitoring
  Evaluate soil EC directly before and after irrigation or fertilization. As such, growers can adjust nutrient strategies in real-time.

• Fertilizer and Irrigation Optimization
  Fine-tune fertigation schedules by monitoring EC fluctuations in situ, improving both crop yield and input efficiency.

• Soil Science and Research
  Conduct field research or classroom experiments with a tool that is accurate, easy to use, and requires no lab preparation.

• Home Gardeners and Hobby Growers
  A reliable solution for understanding soil health without the need for advanced technical skills or external lab services.