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2. Heart rate monitor - Wikipedia

   en.wikipedia.org/wiki/Heart_rate_monitor

   A heart rate monitor (HRM) is a personal monitoring device that allows one to measure/display heart rate in real time or record the heart rate for later study. It is largely used to gather heart rate data while performing various types of physical exercise. Measuring electrical heart information is referred to as electrocardiography (ECG or EKG).

3. Pulse watch - Wikipedia

   en.wikipedia.org/wiki/Pulse_Watch

   Wearable technologies that monitor heart rate has interested users for a very long time. [14] In addition to the pulse watch which monitors heart rate from pulse detection at the wrist. There are also devices which use similar technologies to monitor heart rate from the ear, forearm and chest, using a chest strap. [2]

4. Photoplethysmogram - Wikipedia

   en.wikipedia.org/wiki/Photoplethysmogram

   [1] [2] A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. [3] A conventional pulse oximeter monitors the perfusion of blood to the dermis and subcutaneous tissue of the skin. Finger pulse oximeter. With each cardiac cycle the heart pumps blood to the periphery. Even though ...

5. Oura Health - Wikipedia

   en.wikipedia.org/wiki/Oura_Health

   The company's main product is the Oura Ring, which collects health data from the wearer's finger like a regular activity bracelet or heart rate monitor. The activity, heart rate, body temperature, respiratory rate and sleep data collected by the ring are transmitted wirelessly via Bluetooth to a smartphone app. Oura launched in 2015 with a ...

6. Pulse oximetry - Wikipedia

   en.wikipedia.org/wiki/Pulse_oximetry

   A pulse oximeter probe applied to a person's finger. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmogram that may be further processed into other measurements. [4]

7. Azumio - Wikipedia

   en.wikipedia.org/wiki/Azumio

   With advancements in mobile phone camera resolution, most smart phones can accurately measure heart rate by analyzing minute color changes of the skin. The application, illuminates a user's finger with a phone's flashlight feature and uses the phone's camera to analyze color changes in the finger tip to track heart rate.