pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended 4090010103 DDO10 Portable DO Meter (Polarographic Type/Color 670,65 € 4090010108 DPO10 Portable pH/ORP Meter(Color screen) 1.DPO10 640,80 € MW600 Dissolved oxygen meter MW600 Price on request