Hikari Accuprobe Hydrometer

Hikari USA Inc. - Accuprobe Hydrometer. Aquarium: Thermometer & Hydrometer Wide Range Specific Gravity Meter For Marine Aquarium Use. Dry Hands design avoids contamination of aquarium or water sample. Takes a more true water sample at a 6 inch depth avoiding inaccurate surface sampling. Accurate to 0. 001 specific gravity & salinity (PPT) measurements. Auto-temperature correcting design. Durable construction for extended life. Designed to give a temperature-corrected reading in warm water aquariums - 68