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wGT3X-BT Monitor

ActiGraph’s Bluetooth® Smart wGT3X-BT wireless activity monitor, in conjunction with the ActiLife software platform, offers the most advanced communication, data capture, screening and analysis features in the industry, while delivering the validated physical activity and sleep/wake measurements on which our clients depend.

The ActiGraph wGT3X-BT provides objective 24 hour physical activity and sleep/wake measurements including raw acceleration, energy expenditure, MET rates, steps taken, physical activity intensity, heart rate R-R intervals**, subject position, total sleep time, sleep efficiency, and ambient light levels.

Equipped with our extensively validated measurement technology, the new Bluetooth® Smart wGT3X-BT is fully backward compatible with previous device models to ensure data comparability and monitor compatibility for our existing clients.


Note: All accessories will be shipped within one business day of order placement.

Document of Conformance | Cross Generation Accuary


*Does not include Software, USB Cable, Dock, or Wear Accessories.

Required Accessories:
See all accessories

Use only ActiGraph approved USB cables, hubs and power supplies. Failure to do so could lead to device failure and possibly fire.

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wGT3X-BT Features

Bluetooth® Smart Wireless Technology

ActiGraph wGT3X-BT monitors are powered by Bluetooth® Smart wireless technology, offering users a host of exciting new wireless capabilities and setting the stage for a broad range of future wireless applications.

Wear Time Sensor

An integrated sensor on the back of the device uses capacitive touch technology to determine whether the device is on or off, allowing for foolproof wear time detection.

Proximity Detection

Detect and log other devices within range to obtain valuable information about social interaction among subjects. Stationary devices can be placed throughout the subject environment to monitor behavior in various predetermined locations.

Mobile App Support

A new suite of mobile apps for for iPhone, iPad and Android platforms allows users to communicate with active devices in the field and provide subjects with real time feedback.


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

Regulatory Requirements

The wGT3X-BT 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

ActiGraph is compliant with IEC standards for “Type BF Applied Part”

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.

The wGT3X-BT 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.