ORP meter MW500 Back Catalog number: MW500 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended HI98127 pH tester pHep® 4 Price on request CD600 TDS tester with ATC, range: 0 - 1990 ppm Price on request MW804 pH/EC/TDS/Temp tester MW804 Price on request