Which blood pressure monitor is good, at present the main recommendation of the regular manufacturers of electronic blood pressure monitor and mercury column blood pressure monitor, hand ring measurement of blood pressure or wrist measurement of blood pressure is not recommended, especially the hand ring measurement of blood pressure. Regular manufacturers of electronic sphygmomanometers are very accurate after calibration, and it is also more convenient to monitor blood pressure in the home. Many elderly people may not use mercury column sphygmomanometers, while electronic sphygmomanometers are easier to operate and can be used by hypertensive patients or elderly patients to measure their blood pressure regularly. Mercury column sphygmomanometers are also being phased out because mercury is a substance that can cause pollution in the surrounding environment, and hospitals are less likely to use mercury column sphygmomanometers to measure blood pressure.