pH55 (pH/Temp waterproof tester Mi5559 Back Catalog number: MI5559 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended CD610 TDS tester with ATC, range: 0 - 10000 ppm Price on request MW401 TDS meter MW401 Price on request MW101 Portable pH meter, 0.00 to 14.00pH, 2point cal. Price on request