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 18901143 DEC1-S Cond sensor 33,84 € CD97 TDS tester with ATC, range: 1 - 999 ppm Price on request