pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended PH600 pH tester with 1 point calibration, ±0.2 pH accura Price on request 4090010108 DPO10 Portable pH/ORP Meter(Color screen) 1.DPO10 640,89 € CD97 TDS tester with ATC, range: 1 - 999 ppm Price on request