Hydrometer with Cylinder Hydrometer scale from 1.021 to 1.031 Cylinder Volume 500 ml TROPIC MARIN

Tropic Marin High Precision Hydrometer with Measuring Cylinder

The salt content of seawater, known as density, is one of the fundamental parameters of marine aquariums. Many species are sensitive to even very slight variations in this parameter, necessitating regular and precise control.

At 25 °C, the density of natural seawater at 35 ‰ is 1.026. For water in a marine aquarium maintained at 25 °C, it is recommended to keep a density between 1.025 and 1.027 depending on the type of aquarium.

Reliable Density Measurement

The Tropic Marin High Precision Hydrometer is designed to allow precise and reproducible measurement of seawater density. It is calibrated for use at 25 °C, the reference temperature for measurements.

Measuring Cylinder Features

High Precision Hydrometer Features

Measurement Method

Density depends on temperature. To obtain a correct result, the temperature of the water measured must be 25 °C.

Fill the measuring cylinder with a maximum of 400 ml of seawater at 25 °C. Ensure the hydrometer is clean and dry, then gently place it in the water until it floats freely.

Read the density on the blue part of the graduated scale, at the water's surface level, not at the meniscus located higher on the edges.

Maintenance and Precautions

After each use, thoroughly rinse the measuring cylinder with tap water or osmosis water to remove salt residues and prevent any measurement drift.

Do not confuse this hydrometer with the aerometer used in some countries, whose scale and indications differ.