PRECISION BALANCES - Complexlab

02Interesting facts about the determination of densityOne of the main areas of application for laboratory balances is determiningdensities, i.e. determining the specific weight of liquids and solids.To do this you will need a highly accurate precision balance and a densityset. It is particularly convenient if the balance can calculate and displaythe density immediately. It has become apparent that using weighingwhen determining the density of liquids and solids in accordance withthe buoyancy method gives particularly accurate results (Archimedes‘principle).Density determination of liquids:By means of measuring the buoyancy with a glass plummetDensity determination of solid matter:The density is the ratio of weight [g]: Volume [cm 3 ]. The weight isderived by weighing the sample in air.The volume is determined from the buoyancy [g] of a sample, which issubmerged in a liquid. The density [g/cm 3 ] of this liquid is known.Applications:• Materials analysis• Density of porous materials• Pre-packaged goods check, whenever the merchandise is soldaccording to volume [cm 3 ]. This volume is calculated fromthe weight [g] : density [g/cm 3 ].Plummetfor density determination of liquids. Made of glass, hanging on aplatinum wire.Volume 10 cm 3 , weight 30 g, length 169 mm, verifiable,KERN 152-532, € 97,–Verification, KERN 950-272, € 32,–You can find examples of balances for density determination on pages15, 22, 29-33, 37-39, 42-44, 46, 100/101.Your KERN product specialist will behappy to help:KERN EMB-VKERN ACS-N/ACJ-NMBettina HampeProduct specialistPrecision balancesTel. +49-(0) 74 33-99 33-147Fax +49-(0) 74 33-99 33-29147hampe@kern-sohn.com10Precision balances