Measures Dissolved Oxygen, pH, Conductivity, TDS, Salinity and TemperatureFeatures:Includes EC500 pH/Conductivity meter with combination high accuracy multi-ranging Conductivity sensor for Conductivity, TDS, Salinity, pH and Temperature measurementsIncludes DO600 Dissolved Oxygen meter with electrode, replacement membrane cap, electrolyte, and polishing paperComplete with 3 calibration standards, 3 pH buffer pouches plus rinse solution, 3 plastic cups, batteries and carrying case