The ithlete Finger Sensor is the most convenient way to measure heart rate variability.
The most convenient way to measure heart rate variability, the ithlete Finger Sensor brings an ergonomic design and comfortable fit to daily HRV measurement. With a robust build, shielding from external light and increased sensitivity this sensor will work more easily, for more people, and for longer than any other available.
- Simplicity & convenience of measurement
- Durable and portable, perfect for travel
- No battery required
- High quality design
- Scientifically validated
- Universal to any device with a Lightning connector or USB-C port
How to use the ithlete Finger Sensor
The ithlete Finger Sensor is extremely simple to use, simply place it on your finger, plug into your device and you’re ready to go. Open the ithlete app, select take a reading and follow the 1 minute paced breathing measurement. The app will then deliver objective, actionable guidance on your training and recovery.
To get the best experience with your Finger Sensor please ensure you follow these tips:
- The receiver is fully plugged into the phone, and is not blocked by a case or sleeve (which should make a firm ‘click’)
- The fleshy part of the left index finger is level with the end of the finger sensor
- Make sure your hand is resting (palm up) on a hard surface
- Remain still throughout the measurement
The ithlete Finger Sensor relies on an infrared light being sent through the fingertip to monitor blood flow. For this reason it can be sensitive to interference from bright lights. If you are finding you’re having trouble getting a reading, try turning your hand palm down or covering the finger sensor with the phone during measurement.
This video provides further guidance on using your sensor.
How does the ithlete Finger Sensor work?
The finger sensor monitors HRV in the same way as the pulse monitors often seen in hospital emergency departments. Infra-red light is sent through the tip of the finger with a sensor on the other side that measures changes in the amount of light received. As the heart beats blood is sent around the body, with each beat the blood density is the finger changes and it is these changes that are recorded by the finger sensor.
As with all ithlete heart rate variability measurements, this information is processed to present you with a daily HRV number and personalised training recommendations.
All current iPhones, iPads and even an iPod Touch are compatible with the ithlete Finger Sensor.
Phones with a USB-C port and running Android v4.3 or later. In practice, this means most current Android models. If you’re unsure get in touch via email and we’ll be happy to help.
The ithlete finger sensor has been tested on hundreds of people and works fine in the vast majority of cases. However, people with poor circulation in their fingers, low blood pressure, or who are wearing thick nail varnish may experience problems and are advised to choose another sensor type, such as a chest strap. We also don’t recommend the finger sensor for children, due to the small size of their fingers.
The ithlete Finger Sensor is designed specifically for use with the ithlete HRV app and is not compatible with any other apps at this time.