Hua'an is a digital blood pressure monitor chinese manufacturer
,digital blood pressure monitor is the use of modern electronic technology and the principle of indirect measurement of blood pressure.
There are electronic sphygmomanometer arm, wrist points; their technology has undergone the most original first-generation and second-generation (arm used), the third generation (wrist use) development. Electronic blood pressure has become a major tool for home self-test blood pressure. Electronic sphygmomanometer is also increasingly being used in hospitals and other medical institutions.
E  using the oscillometric sphygmomanometer principle, the principle should be accurate. Clinically validated electronic sphygmomanometer is auscultation as a standard, the use of statistical methods to design. But this does not mean that the use of mercury manometer auscultation the measured results accurate than measurements of electronic sphygmomanometer. Of course, that measurement is more accurate electronic sphygmomanometer is wrong than using a mercury manometer auscultation the measured results.
Mercury column sphygmomanometer doctors use only pressure measurement tool. Considers mercury column sphygmomanometer sphygmomanometer is accurate view is one-sided, because the mercury column sphygmomanometer is just a gauge only, focused stethoscope auscultation performed by a doctor. Currently the developed countries generally prohibit the use of mercury column sphygmomanometer, and the use of higher precision electronic pressure gauge (table).
Today, electronic sphygmomanometer has achieved automatic intelligent measurement, the measurement data is automatically transmitted through the network to gain intimate times of health management platform, and generate health data report feedback to the user. Measurement results due to the use of more advanced technology, but also more accurate than some traditional electronic sphygmomanometer.
Measured by the individual, the electronic sphygmomanometer and stethoscope method differences is normal.