Hanna Instruments pHep Tester

These are professional, waterproof pocket meters used for testing water and liquid acidity. The cost depends on the specific model inside the box: • pHep 4 (Model HI98127): This version has a 0.1 pH resolution and typically costs $140. • pHep 5 (Model HI98128): This version is more precise with a 0.01 pH resolution and typically costs $155. Key Value Points • Replaceable Electrode: One of the reasons these are more expensive than basic "yellow" testers is that the electrode cartridge (the part that touches the water) is replaceable. A new cartridge typically costs about $85. • Laboratory Accuracy: These feature automatic temperature compensation (ATC), which ensures the reading is accurate even if the water is hot or cold. Since you already have the larger HI99121 Direct Soil kits we looked at earlier, this pocket tester is likely your "on-the-go" tool for checking irrigation water or nutrient solutions, whereas the other kits are for your direct soil/grove measurements.

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