Mercurial Sphygmomanometer is a device that measures blood pressure. It is composes of an inflatable rubber cuff, which is wrapped around the arm. A measuring device indicates the cuff’s pressure. A bulb inflates the cuff and a valve releases pressure. A stethoscope is used in conjuction with BP Apparatus Mercurial to listen to arterial blood flow sounds. Mercurial Blood Pressure Monitor sphygmomanometer