APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended MC122 pH controller MC122 Price on request MW101-SOIL MW101-E Portable pH meter MW101-SOIL Price on request MW102 µp-based ATC pH/Temp meter MW102 Price on request