pH tester pHep® 4 Back Catalog number: HI98127 Manufacturer: Hanna Instruments Czech Availability: Currently unavailable Price on request - + Recommended MW101 Portable pH meter, 0.00 to 14.00pH, 2point cal. Price on request MI150 pH/Temp combined bench meter Mi150 Price on request ORP57 ORP/Temp waterproof tester ORP57 Price on request