ActiGraph GT9X Link

The new redesigned ActiGraph GT9X Link features ActiGraph’s validated 3-axis accelerometer and data filtering technology with a sleek, low profile case and high resolution liquid crystal display (LCD) window for optional real-time subject feedback. The Bluetooth® Smart ActiGraph GT9X Link contains a gyroscope, magnetometer, and secondary accelerometer to deliver valuable information about movement, rotation, and body position.

U.S. federal law restricts this device to sale by or on the order of a physician.

ActiGraph Objective Measures

The ActiGraph GT9X Link captures and records high resolution raw acceleration data, which is converted into a variety of objective activity and sleep measures using publicly available algorithms developed and validated by members of the academic research community. Available measures include:

  •   Raw Acceleration (G's)
  •   Activity Counts
  •   Energy Expenditure
  •   MET Rates
  •   Steps Taken
  •   Physical Activity Intensity
  •   Activity Bouts
  •   Sedentary Bouts
  •   Body Position
  •   Sleep Latency
  •   Total Sleep Time
  •   Wake After Sleep Onset
  •   Sleep Efficiency
  •   Heart Rate R-R Intervals*

*Requires compatible Bluetooth® Polar H7 or Polar H10 heart rate monitors


Programmable Display

The ActiGraph GT9X Link features a programmable LCD window that can be configured to display date and time and/or provide real-time activity feedback such as steps and kcals, or it can be completely disabled.

Inertial Measurement Unit (IMU)

An integrated IMU containing a gyroscope, magnetometer, and secondary 3-axis accelerometer sensors provides raw position and rotational data for a variety of advanced applications, including inclination, gait analysis, and fall detection.*

Bluetooth® Smart

The ActiGraph GT9X Link is powered by Bluetooth® Smart technology and offers a variety of wireless features, including heart rate monitoring, proximity detection, and communication with ActiGraph’s suite of mobile applications for iOs and Android devices.

Wear Time Sensor

An advanced wear time sensor on the back of the device uses capacitive touch technology to automatically detect when a wrist worn device has been removed for simplified compliance monitoring and data cleaning.

* ActiGraph products are not intended to diagnose, treat, cure, or prevent any disease.


The ActiGraph GT9X Link captures and records high resolution human activity information using a solid state 3-axis MEMS accelerometer and our proprietary filtering algorithm. The ActiGraph GT9X Link is fully backward compatible with previous device models to ensure data comparability for our existing clients.


3.5 x 3.5 x 1 cm


14 grams

Sample rate

30-100 Hertz

Battery life

14 days*



Data storage

180 days

Dynamic range (primary accelerometer)

+/- 8G

IMU Sample Rate

100 Hertz

Gyroscope dynamic range

+/- 2000 deg/sec

Dynamic range (secondary accelerometer)

+/- 16G

Magnetometer dynamic range

+/- 4800 micro-Tesla


USB, Bluetooth® LE

Water resistance

IP27 1 meter, 30 min.

Wear location

Wrist, waist, ankle, thigh


1 year

*Wireless disabled, 30 Hz sample rate, IMU disabled, sleep mode.

Regulatory Requirements

The ActiGraph Link is an FDA cleared Class II medical device within the United States and a Class I medical device within the European Union that abides by the regulatory requirements listed below:

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