Hikari Accuprobe Aquarium Hydrometer, Full

Dry Hands design avoids contamination of aquarium or water sample Accurate to 0.001 specific gravity and salinity (PPT) measurements Auto-temperature correcting design Designed to give a temperature-corrected reading in warm water aquariums – 68°F to 85°F (20°C to 30°C) Self-leveling hanging device included