In a laboratory, very precise quantities of reagents often have to be weighed out. High precision scales can measure masses down to 1/ 10000 gram. As such, they stand on granite blocks to avoid vibrations and are protected against changes in airflow by a dome.
Al laboratori sovint cal pesar quantitats molt precises de reactius. Les balances d' alta precisió poden mesurar masses de fins a 1/ 10000 de gram (0, 1mg). Per aconseguir- ho, reposen sobre blocs de granet per evitar vibracions i estan protegides contra corrents d' aire per una cúpula.