Extech ExStik II pH/Conductivity Meter EC500

Extech EC500 Waterproof ExStik II pH/Conductivity Meter, Green/White, Batteries Included Designed and built for a wide range of applications including process and HVAC cooling towers, industrial and commercial boilers, reverse osmosis systems, pools and spas. The ExStik II pH/conductivity meter combines a rugged flat surface pH electrode with an auto ranging highly accurate conductivity cell to precisely measure conductivity, TDS, salinity, pH and temperature. It delivers seven selectable units of measure: pH, S, mS, ppm, ppt, mg/L and g/L. It also provides automatic temperature compensation, adjustable conductivity to TDS ratio (0.4 to 1.0) and a 0.5 salinity ratio. The unit features an analog bar graph that indicates trends, internal memory that stores up to 25 data sets, a renew feature that alerts you when the electrode needs replacement, auto power off and a low battery indicator. It comes complete with protective sensor cap, sample cup with cap, four batteries and a 48 In. (1.2m) neck strap.