How Temperature and Density Are Measured

Many types of thermometers are available for measuring the temperature of liquid in a tank. Some thermometers are standard for a particular type of tank. Because the temperature of liquid in a tank might vary throughout its depth, you might need to perform readings at various depths and calculate an average reading.

You use a hydrometer to measure the density of liquids. A hydrometer floats vertically in liquid. The buoyancy of the hydrometer depends on the density of the liquid. You first take a sample of the liquid from the tank and put it in a glass cylinder. Then you lower the hydrometer into the tank and take a reading. You also take a temperature reading using a thermometer. You use the temperature reading to convert from the density at the liquid's ambient temperature to the density at its standard temperature.

See also:

• Defining Depot Temperature and Density.

• Defining Default Units of Measure for Bulk Items.

• Calculating Volume from Dip Readings.

• Calculating Volume from Weighbridge Information.

• Setting Up Basic Tank Information.