The AEC-5061 pocket electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. It has multiple applications in research and engineering, with common usage in hydroponics, aquaculture, aquaponics, and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.Measurement Range, 0 to 20 ECAutomatic Temperature Compensation (ATC) 0 to +50CImpact resistant ABS caseSplash-proof membrane key padRetractable electrode, can be extended up to 80mmManual calibration via screw trim potLarge LED displayPocket clip moulded on the rear of the instrument caseSupplied with: Protective cap, calibration screwdriver, 50ml calibration solution, carry case and battery.