APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended HI98127 pH tester pHep® 4 Price on request PH600 pH tester with 1 point calibration, ±0.2 pH accura Price on request MI160 pH/ORP/ISE/Temp combined logging bench meter Mi16 Price on request