APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended HI2002-02 EDGE pH/ORP metr Price on request CD610 TDS tester with ATC, range: 0 - 10000 ppm Price on request MW401 TDS meter MW401 Price on request