APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended MI5560 pH55 (pH/Temp waterproof tester Mi5560 Price on request MW402 TDS meter MW402 Price on request MI160 pH/ORP/ISE/Temp combined logging bench meter Mi16 Price on request