Lab Grade K-10 Salinity/Conductivity Probe Kit Keep track of the salinity in your marine aquarium with the CoralVue HYDROS Salinity Kit. This kit includes a K-10 Conductivity probe and the necessary 28ppt and 35ppt calibration solutions to ensure precise salinity readings. Kit Includes: High-range K-10 Conductivity Probe 28 ppt Calibration Solution (100mL) 35 ppt Calibration Solution (100mL) Techincal Specifications Range: 20 to 2000mS/cmOperating Temp: 0-80CConstant: K=10Housing: POMProbe Dimensions: 12 x 145mmContction: BNCCable Length: 3ft For precise conductivity reading use an isolated testing vessel like the HYDROS iV. This add-on ensures that the test sample is physically separated, preventing any electric interference from other equipment in the aquarium system. *HYDROS iV is not included but recommended