ORP meter MW500 Back Catalog number: MW500 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended CD97 TDS tester with ATC, range: 1 - 999 ppm Price on request MW802 Smart pH/EC/TDS combined meter MW802 Price on request PH600 pH tester with 1 point calibration, ±0.2 pH accura Price on request