pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended PH58 pH/ORP/Temp waterproof tester, -2.00 to 16.00 pH Price on request 4090010103 DDO10 Portable DO Meter (Polarographic Type/Color 670,65 € 4090010001 DORP1+ Pocket ORP Bluetooth Tester 1.DORP1+ Meter 162,79 €