Heart rate monitors with external sensor

External heart rate sensor

— devices that use an external heart rate sensor. Such a sensor is usually attached to the chest using a special belt, and a wireless standard (for example, Bluetooth) is used to communicate with the main unit of the heart rate monitor. Chest straps are relatively inexpensive, accurate (due to their proximity to the heart), and do not interfere with most sports. At the same time, we note that such equipment may not be included in the delivery set; this point for each model should be clarified separately.