Fingertip pulse oximeter YM201

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Pulse blood oxygen is considered the fifth most critical health indicator after heart rate, blood pressure, respiratory rate and temperature. Hemoglobin is an important part of blood cells that carry oxygen from the lungs to the rest of the body. The amount of oxygen that hemoglobin contains at any given moment is called oxygen saturation. Blood oxygen saturation is an important physiological parameter to reflect human respiratory function and whether oxygen content is normal. Main structure: composed of microprocessor, memory, digital to analog converter, small liquid crystal display, light-emitting diode, photosensitive receiver and other components. Measurement principle Based on changes in the amount of light absorbed during pulse.Two light sources located in the visible red spectrum and infrared spectrum alternately irradiate the tested area.The amount of light absorbed during these pulsations is related to the amount of oxygen in the blood.The microprocessor calculates the ratio of the two spectra absorbed and compares the result with a table of saturation values stored in memory to determine the bleeding oxygen saturation. With the ability to resist natural light interference and power frequency interference, it can effectively shield the interference of ambient light to the measurement.Finger free state 8 seconds automatic shutdown energy saving and environmental protection, high-definition large screen data at a glance, high quality environmental protection materials, durable.