pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MC410 TDS monitor MC410 Price on request 4090010208 DCD100 Benchtop Cond/DO Meter (Polarographic Type 999,80 € 4090010101 DORP10 Portable ORP Meter(Color screen) 1.DORP10M 592,24 €