There are several brands of stress analyzers.

Guangzhou Hong Rui Medical Technology Co., Ltd., acting as the agent of Canadian Medea Company, used HRV analysis principle to analyze the interaction between sympathetic nerve and parasympathetic nerve in regulating the heart, automatically measured the activity of autonomic nervous system, reflected the balance ability of sympathetic nerve and parasympathetic nerve, and evaluated and analyzed the physical and mental stress load and functional age of the subjects according to the related factors of heart rate variability. At the same time, through the cardiovascular physical fitness test, we can evaluate the cardiovascular function of patients under pressure, and also evaluate the related situation of blood vessels through the analysis of acceleration pulse waves. Many universities and hospitals recognize and use this instrument.