APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended C65 Waterproof conductivity tester, 0 to 1999 μS/cm Price on request MW402 TDS meter MW402 Price on request MW600 Dissolved oxygen meter MW600 Price on request