pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended CD610 TDS tester with ATC, range: 0 - 10000 ppm Price on request MI806 Portable meter pH/EC/TDS/Temp Mi806 Price on request MI106 Combined portable meter pH/ORP/Temp Mi106 Price on request