APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended PH56 pH/Temp waterproof tester pH56 Price on request CD611 Conductivity tester with ATC, 0 - 20000 µS/cm Price on request MW100 pH meter MW100 Price on request