wGT3X-BT Monitor

The wGT3X-BT is ActiGraph’s flagship activity monitor, used by researchers around the world to capture and record continuous, high resolution physical activity and sleep/wake information. The Bluetooth® Smart wGT3X-BT features ActiGraph’s validated 3-axis accelerometer and digital filtering technology and includes integrated wear time and ambient light sensors.


Note: All ActiLife software, attachment accessories, and USB cables are sold separately.

Document of Conformance | Document of Conformance (Brazil)
Cross Generation Accuracy | Calibration

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Please contact ActiGraph for more information. Caution: U.S. federal law restricts this device to sale by or on the order of a physician.

Does not include Software, USB Cable, Dock, or Wear Accessories.
Use only ActiGraph approved USB cables, hubs and power supplies. Failure to do so could lead to device failure and possibly fire.

Bluetooth® Smart

ActiGraph wGT3X-BT monitors are powered by Bluetooth® Smart technology and support 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.

Proximity Detection

The wGT3X-BT can be configured to detect and log the presence of other devices within range, providing valuable information about social interaction among subjects. Stationary devices can be placed throughout the subject environment to monitor behavior in various predetermined locations.

Wear Time Sensor

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

Ambient Light Sensor

The wGT3X-BT includes an integrated ambient light sensor that delivers lux values alongside activity information, providing insights into the relationship between the subject environment and activity and sleep behaviors.

Dimensions 4.6cm x 3.3cm x 1.5cm
Weight 19 grams
Sample Rate 30-100 Hertz
Dynamic Range +/- 8G
Battery Life 25 days**
Data Storage 120 days / 2 GB
Communication USB, Bluetooth® Smart
Water Resistance 1 meter, 30 minutes
Wear Location Wrist, Waist, Ankle, Thigh
Warranty 1 Year
*Requires compatible wireless heart rate monitor
**Wireless disabled, 30 Hz sample rate

The wGT3X-BT Monitor 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 wGT3X-BT Monitor is water resistant in accordance with IEC 60529 IPX7, 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.

ActiGraph products are for research/prescription use only.


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