pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended CD600 TDS tester with ATC, range: 0 - 1990 ppm Price on request PH600 pH tester with 1 point calibration, ±0.2 pH accura Price on request CD611 Conductivity tester with ATC, 0 - 20000 µS/cm Price on request