pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MI60P Combination probe for pH/EC/TDS/Temp for MW803/MW8 Price on request MI605 Oxygen portable meter Mi605 Price on request HI 98308 Water Purity Tester, 0.0 to 99.9mS/cm Price on request