Measuring your blood pressure at home and keeping a record of the different measurements will show you and your doctor how much your blood pressure changes during the day. Your doctor can use your measurements to see how your blood pressure medicine is working. To measure your blood pressure at home, you can use either an mercury sphygmomanometer or a digital monitor. The sphygmomanometer device has a mercury column that is read by looking at the mercury level while checking your pulse with a Stethoscope. On the other hand; Safecare Digital monitors are fully automatic and dispalys your readings on a digital screen.