APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended PH58 pH/ORP/Temp waterproof tester, -2.00 to 16.00 pH Price on request MI306 Automatic combined EC/TDS/NaCl/Temp meter Mi306 Price on request C65 Waterproof conductivity tester, 0 to 1999 μS/cm Price on request