HYDROS Salinity Probe KitLab 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 (3ft cable length) 28 ppt Calibration Solution (100mL) 35 ppt Calibration Solution (100mL) Techincal Specifications Range: 20 to