ORP meter MW500 Back Catalog number: MW500 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended MI150-E pH/Temp combined bench meter Mi150-E Price on request MI160 pH/ORP/ISE/Temp combined logging bench meter Mi16 Price on request C65 Waterproof conductivity tester, 0 to 1999 μS/cm Price on request