Warmtone WT-11 Salinity Hydrometer
A WT Salinity Hydrometer, like the WARMTONE WT-1903, is a device used to measure the salinity (salt concentration) of water, particularly in saltwater aquariums. It's essentially a type of hydrometer that's been calibrated to indicate the percentage of salt in a solution. These hydrometers are designed to be easy to use and provide accurate readings for maintaining a healthy environment for marine life.