A typical pulse watch device will use photoplethysmography (PPG), this methodology uses light and optical detectors to measure heart rate. Light emitting diodes (LEDs) and photodiodes, which are sensitive to light, measuring changes in light absorption in the body.

How do Smartwatches detect pulse?

Smartwatches track heart rate in a similar way as checking the pulse, but without the use of physical pressure. Popular Smartwatches from brands like Apple, Samsung, and Fitbit use photoplethysmography to detect a heartbeat. This is the process of projecting a green light on the skin, which gets absorbed by the blood.

Is there any watch which works on pulse?

Junket Tribe skeleton Automatic Pulse Skeleton Analog Watch - For Men & Women. ... This watch is beautiful skeleton design. This watch does not require any battery. It works on your body movement.