APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended HI 98308 Water Purity Tester, 0.0 to 99.9mS/cm Price on request MC120 pH monitor MC120 Price on request MW600 Dissolved oxygen meter MW600 Price on request