Nicholson Hydrometer

Product Code : EL-PLE-12030Eduscope India is a leading Nicholson Hydrometer Quick Answer: Nicholson Hydrometeris a constant-immersion, brass hydrometer used to measure the specific gravity of liquids and small solids by weight comparison rather than a floating-scale reading.

The instrument is made of brass and finished brass-plated for a corrosion-resistant surface that stands up to repeated use around water and other test liquids. Its hollow body displaces enough liquid to float, and two pans complete the design: an upper loading pan above the liquid surface for the specimen or weights, and a weighted lower loading pan submerged beneath the body. That lower weight keeps the instrument's centre of gravity below its centre of buoyancy, so it self-rights and floats exactly vertical. Rather than reading a graduated stem at whatever depth it happens to float, the instrument is always brought down to the same fixed immersion mark, and the density of a specimen is read from how much weight has to be added or removed on the upper pan to return it to that mark — the basis of its constant-immersion, direct-reading method for physics lab equipment India density experiments on both liquids and solids.

It is part of EduScope India'sPhysics Lab Equipmentrange, and belongs to the same liquid-property teaching set asHare's ApparatusandPascal's Apparatus.