The HI-98319 Salinity Tester accurately measures the level of salt in reef and marine aquariums. This pocket-sized checker enables you to monitor salt levels within saltwater tanks, providing key information to take action and keep your water balanced. This salt tester also measures temperature, and includes solutions in the box for immediate digital salinity measurement with higher accuracy than refractometers.
 
This electronic salinity tester measures both high and low ranges of salinity in reef tanks and marine aquariums in parts per thousand (ppt), Practical Salinity Units (PSU), or Specific Gravity (SG).