blood pressure monitor; sphygmomanometer
Medical instrument for measuring blood pressure. In everyday contexts, 血圧計 is the common term; スフィグモマノメーター is a technical loanword rarely used outside medical settings.
I had my blood pressure measured with a blood pressure monitor at the hospital.
I bought a home blood pressure monitor.
I measure my blood pressure with a blood pressure monitor every morning.
This blood pressure monitor is easy to use.