Which one is based on the principle of Archimedes?

Which one is based on the principle of Archimedes? Correct Answer Lactometer

The correct answer is Lactometer.

• Lactometer is based on the principle of Archimedes.
• Archimedes’ principle, states that any body completely or partially submerged in a fluid (gas or liquid) at rest is acted upon by an upward, or buoyant, force, the magnitude of which is equal to the weight of the fluid displaced by the body.
• Instruments like types of hydrometers such as lactometer, saccharometer obey the Archimedes principle.

• Lactometer is a small glass instrument that is used used to find out the amount of water in the milk​.
• It works on the principle of specific gravity of milk (Archimede’s Principle). 
• It measures the relative density of milk with respect to water. 
• If the specific gravity of a sample of milk is within the approved ranges, the milk is pure and If it is not, then there is some adulteration.

• Manometer - It is based on the principle of Hydrostatic Balance and is used for measuring the pressure.
• Auxanometer - For measuring the increase of growth in plants.
• Odometer - It registers the distance travelled by the vehicle
• Colorimeter - It is based on Beer-Lambert's law and is used to measure the absorbency of light waves.