pH55 (pH/Temp waterproof tester Mi5559 Back Catalog number: MI5559 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MC122 pH controller MC122 Price on request MI806 Portable meter pH/EC/TDS/Temp Mi806 Price on request MW101 Portable pH meter, 0.00 to 14.00pH, 2point cal. Price on request