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Hanna Instruments – HI98118 GroLine Waterproof Hydroponic pH Tester

The HI98118 GroLine pH Tester is a compact, waterproof pH meter designed for accurate and reliable measurements in hydroponics, agriculture, and general water testing. It features a built-in temperature sensor for automatic temperature compensation (ATC) to ensure precise readings across varying conditions. With automatic one or two-point calibration and a renewable junction to prevent clogging, it delivers stable and dependable performance. The lightweight pen-style design, long battery life, and easy push-button operation make it ideal for routine pH monitoring.

  • Built-in Automatic Temperature Compensation (ATC)
  • Renewable junction to prevent clogging and drift
  • Automatic one or two-point calibration
  • Long battery life – approx. 1000 hours continuous use

Description

The HI98118 GroLine pH tester is engineered for users who require simple yet accurate pH measurements in nutrient solutions and water samples. It measures pH from 0.00 to 14.00 pH with ±0.1 pH accuracy and a resolution of 0.01 pH. The integrated temperature sensor automatically compensates readings from 0 to 50°C (32 to 122°F), ensuring consistent results even when temperatures fluctuate. Calibration is fast and convenient with automatic recognition of standard buffers (pH 4.01, 7.01, 10.01) or Hanna’s Quick Cal solution (pH 6.86).

Designed with user convenience in mind, the tester includes a stability indicator that confirms when a stable reading is achieved. A renewable cloth junction extends electrode life by clearing clogs that cause erratic readings. The startup screen displays the remaining battery percentage, while a low battery indicator warns when less than 10% power remains. Powered by a CR2032 battery, the meter offers approximately 1000 hours of continuous use, making it a dependable tool for daily monitoring.

Features

  • Built-in temperature sensor for Automatic Temperature Compensated measurements.
  • Renewable junction to clear any clogging that causes readings to drift and be erratic.
  • Stability indicator that disappears once a stable reading is obtained.
  • Automatic calibration to one or two points at a push of a button.
  • Uses Hanna’s Quick Cal pH/EC standard with a pH value of 6.86. The standard can also be used to calibrate conductivity meters to 5,000 μS/cm.
  • Battery % level remaining displayed at startup.
  • The low battery indicator is displayed when less than 10% battery life is remaining.

Specifications

pH Range 0.00 to 14.00 pH
pH Resolution 0.01 pH
pH Accuracy ±0.1 pH
Temperature Range 0.0 to 50.0°C / 32.0 to 122.0°F
Temperature Resolution 0.1°C / 0.1°F
Temperature Accuracy ±0.5°C /±1°F
pH Calibration automatic, at one or two points using standard buffers (pH 4.01, 7.01,10.01); one point calibration using quick calibration solution
Temperature Compensation automatic from 0 to 50°C (32 to 122°F)
Battery Type/Life 1.5V CR2032 (1) / approximately 1000 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 160 x 40 x 17 mm (6.3 x 1.6 x 0.7“)
Weight 65 g (2.3 oz.)
Ordering Information HI98118 GroLine is supplied with a protective cap, (3) HI50036 Quick Cal calibration sachets (20 ml), (1) HI700601 general purpose cleaning solution sachet (20 ml), (1) CR2032 battery, instruction manual, and quality certificate.

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