Hikari Accuprobe Hydrometer

Durable Construction For Extended Life•"Dry Hands" design avoids contamination of aquarium or water•Takes a more "true" water saple at a 6 inch depth, avoiding inaccurate surface sampling•Accurate to ±0.001 specific gravity and salinity (PPT) measurements•Auto temperature-correcting design to give a temperature-corrected reading in warm water aquariums - 68°F to 85°F (20°C to 30°C)•Readings can be taken in or outside the aquarium•Self-leveling, hanging device collects perfect samples•Scientifically verified design offers the ultimate in accuracy