Compact Conductivity meter with interchangeable cell and automatic temperature compensation (0 - 50 ºC). Conductivity range according to model: 1,0 - 199.9 ?S/cm, 10 - 1999 ?S/cm or 0,1 - 19.99 mS/cm, accuracy ±1% F.S. (full scale). Single point calibration. Auto-power off feature helps you effectively conserve battery life. Water-tight. Warranty 1 year