Which instrument is used to measure the blood pressure manually?

A sphygmomanometer is the instrument used to measure blood pressure manually. It typically consists of an inflatable cuff, a measuring unit (mercury manometer or aneroid gauge), and a mechanism for inflation (manual bulb). Used along with a stethoscope, it measures systolic and diastolic blood pressure by listening to Korotkoff sounds. A centrifuge separates substances of different densities by rapid rotation, electrophoresis separates molecules based on charge and size using an electric field, and a thermal cycler is used in PCR (Polymerase Chain Reaction) to amplify DNA samples through controlled temperature changes.