pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MC310 Conductivity monitor MC310 Price on request PH58 pH/ORP/Temp waterproof tester, -2.00 to 16.00 pH Price on request MW302 Conductivity meter MW302 Price on request