pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended CTS-21102 APCI Capillary Electrode, API 4000, API 5000, 4500 Price on request MI806 Portable meter pH/EC/TDS/Temp Mi806 Price on request MW803 pH/EC/TDS/Temp tester MW803 Price on request