Provides 24 hour monitoring, the GroLine Monitor automatically logs your results every 15 minutes over the last 30 days. Minimum, maximum, and average values are stored so you can recognise when patterns arise and help prevent future problems. Learn More

The HI-98131 GroLine tester features a large multi level LCD which displays both pH, EC or TDS and temperature readings simultaneously. Learn More

This GroLine Hydroponics pH tester has been designed with many advanced features that are found typically in more expensive portable instrumentation. These features include automatic calibration to one or two points, automatic buffer recognition, calibrated buffer tags, stability indicator, low battery indicator, and selectable automatic shut off. Learn More

The meter has a range of 0.0 to 12.00 pH and a resolution of 0.01pH with accuracy at ±0.05pH @ 25°C. Calibration is automatic at one or two-point. Learn More

The HI-98331 Soil Test™ is a pocket tester specifically designed to directly measure soil conductivity and temperature. With a temperature sensor in the penetration probe, measurements are automatically temperature compensated. Learn More