pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MI5559 pH55 (pH/Temp waterproof tester Mi5559 Price on request MC125 pH/ORP controller MC125 Price on request CTS-21212 TIS Capillary Electrode, API 2000, QTRAP Price on request