APCI Capillary Electrode, API 4000, API 5000, 4500 Back Catalog number: CTS-21102 Availability: In the manufacturer's stock Price on request - + Recommended EC59 EC/TDS/Temp waterproof tester EC59 Price on request MW101-SOIL MW101-E Portable pH meter MW101-SOIL Price on request MW804 pH/EC/TDS/Temp tester MW804 Price on request