Heart rate sensor

The Exercise Heart Rate sensor BT47i monitors a person’s heartbeat. The sensor consists of a transmitter belt and a receiver. The transmitter belt has to be worn around the chest and held in place by the elastic strap. The transmitter detects electrical signals at the surface of the skin by two electrodes embedded in the chest belt and transmits the information to the receiver via a low frequency electromagnetic field. The reception range of the receiver is circa 80-90 cm. Each time the heart beats an electrical signal is generated. By graphing this signal the heart rate can be determined. The transmitter switches off automatically as soon as there is no skin contact between electrodes and the belt.
The battery in the belt has a lifetime of about 2500 transmit hours. When the battery gets weaker, the range of transmission gets smaller. Then the chest belt has to be replaced.

Suggested experiments
• Compare the heart rate of different individuals.
• Check the person’s heart rate before, during and after a short period of vigorous activity.
• Monitor the recovery rate: that is how fast a person’s heart rate returns to normal after exercises.
• Check for baroreceptor reflex: that is, changes in heart rate for a person when reclined, sitting, and standing caused by the need for the heart to pump blood to different levels.
• Check a person’s heart rate before and after caffeine consumption.
• Check a person’s heart rate before and after eating.
• Check your own heart rate at different times of the day.
• Monitor a person’s heart rate as they hold their breath.

The CMA Heart Rate sensor can be directly connected to the analog BT inputs of the CMA interfaces.
Attention: The sensor cable BT - IEEE1394 needed to connect the sensor to an interface is not supplied with the sensor and has to be purchased separately (CMA Art. Nr BTsc_1).

Technical specifications of the sensor are described in its User's guide.
Item ID
In stock
Price ex VAT
€ 133,50