pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended CD610 TDS tester with ATC, range: 0 - 10000 ppm Price on request TH300 Thermometer TH300 Price on request HI 98308 Water Purity Tester, 0.0 to 99.9mS/cm Price on request