Meters & Testing

GroLine Monitor for Hydroponic Nutrients with Inline Probe Hanna Instruments’ GroLine Monitor for Hydroponic Nutrients with Inline Probe makes nutr...

GroLine Monitor for Hydroponic Nutrients The GroLine Monitor for Hydroponic Nutrients provides 24/7 pH&EC measurements for consistent yields ev...

GroLine Waterproof Portable Hydroponics pH/EC/TDS Meter GroLine’s Waterproof Portable Hydroponics pH/EC/TDS Meter is designed to make nutrient test...

GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester The GroLine pH and TDS water tester features a large multi-level LCD that displa...

GroLine Soil pH Tester The GroLine Soil pH Tester is designed for taking direct pH measurements (±0.05 pH accuracy) in soil for environmental and a...