ActiGraph GT9X Link

The 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 includes a gyroscope, magnetometer, and secondary accelerometer to deliver valuable information about movement, rotation, and body position.

Request Quote   Download Flyer  
Declaration of Conformity
U.S. federal law restricts this device to sale by or on the order of a physician.

ActiGraph Digital 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 Intensity
  • MVPA
  • Steps
  • Calories
  • MET Rates
  • Locomotion
  • Total Movement
  • Total Sleep Time (TST)
  • Sleep Efficiency
  • Wake After Sleep Onset (WASO)
  • Sleep Fragmentation
*Requires compatible Bluetooth® Polar H7 or Polar H10 heart rate monitors

ActiGraph Link Features

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.

ActiGraph Link Specifications

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:

  • EN60601-1-Medical Device General Safety Requirements
  • Part 15.109 (US) – Radiated Emission Limits of Unintentional Radiators
  • Part 15.249 (US) – Radiated Emission Limits of Intentional Radiators
  • ICES-003 (Canada) – Interference Causing Equipment Standards for a Digital Apparatus.
  • ActiGraph is compliant with IEC standards for “Type BF Applied Part”

The ActiGraph Link is water resistant in accordance with IEC 60529 IP27, or immersion in one (1) meter of water for up to 30 minutes.

All ActiGraph products are manufactured Lead Free and are RoHS Compliant.

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

Frequently Asked Questions

The ActiGraph Link is water resistant to 1 meter for 30 minutes according to IP27 certification. The device can be worn during bathing and swimming activities.
The accelerometer measures acceleration normalized to Earth gravity (g). The gyroscope measures angular rates in degrees per second. The magnetometer measure magnetic field strength in microteslas. The thermometer measures temperature of the IMU in Celsius.
Variations in magnetic north versus true north vary by location in a predictable way. There are lookup tables available. The magnetic field measurements may also be affected by hard and soft iron effects.
Yes, the ActiGraph Link uses the same accelerometer and sampling and filtering methods as the GT3X+ line of activity monitors.
No, the ActiGraph Link display will operate according to the parameters selected during initialization until it has been reinitialized with ActiLife.

ActiGraph Activity Monitors

Compare all activity monitors 

Get Help

Find troubleshooting tips for your ActiGraph GT9X Link device

Contact Support 

User Guide

Learn how to setup and use your ActiGraph GT9X Link device



Get answers to general questions about your ActiGraph GT9X Link device

View all FAQs 

Get Support

Get the latest firmware and manuals for the ActiGraph GT9X Link

Learn More