pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MI5560 pH55 (pH/Temp waterproof tester Mi5560 Price on request CD610 TDS tester with ATC, range: 0 - 10000 ppm Price on request MW302 Conductivity meter MW302 Price on request