... meter, CF meter, condutometer, ORP controller, ORP meterPHscan10/20 Waterproof Pocket pH TesterMicroprocessor-based functionsTwo points push-button calibrationAuto-power off ... conductivity meter 0-199.9ms ± 0.1ms CDC401 conductivity controller 0-199.9ms 0-100ms ± 0.1ms KCC500 calcium ... meter 100-600ppm ± 1ppm KCC501 calcium controller 100-600ppm 200-500ppm ± PH-8414 pH/Temp/ORP ...