pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended PH55 pH/Temp waterproof tester, -2.0 to 16.0 pH Price on request CTS-21102 APCI Capillary Electrode, API 4000, API 5000, 4500 Price on request HI 98103 pH tester CHECKER Price on request