GT3X+ Activity Monitor
About the GT3X+ Tri-Axis Actigraphy Monitor
The new ActiGraph GT3X+ activity monitor provides physical activity measurements such as activity counts and vector magnitude, energy expenditure, steps taken, activity intensity levels, MET’s and more. An integrated ambient light sensor supplies valuable information on the subject environment. Unlike previous ActiGraph devices, the GT3X+ collects data in raw format at a user specified sample rate up to 100 Hertz. Filtering and epoch selection are performed after data is collected, allowing users to process datasets multiple times at different epoch selections even after a study has ended. The GT3X+ has an inclinometer to determine subject position and identify periods when the device has been removed, and it can be worn during periods of sleep to measure the amount and quality of sleep. The water resistant GT3X+ can withstand submersion at depths to 1 meter for up to 30 minutes. The GT3X+ can store over 40 days of raw data*, and its rechargeable battery is capable of providing power for 30 days between charges.
GT3X+ Specifications
| Transducers | Tri-axis, solid state accelerometer Ambient Light Photodiode |
|---|---|
| Light Sensor | 350-800nm |
| Dynamic Range | +/- 6G |
| Dimensions | 4.6cm x 3.3cm x 1.5cm |
| Weight | 19 g |
| Capacity | 40 Days (Raw data at 30 Hz)* |
| Memory | 512MB |
| Battery Life | 31 Days (Fully Charged) |
| Communication | Full-Speed USB 2.0. Full device download in less than 45 sec. |
| Resolution | 12-bit A/D conversion; 2.93 mG (Raw Data) |
| Sample Rate | 30 Hz – 100 Hz in 10 Hz Increments |
| Parameters | Activity, Steps, Inclinometer, Light |
| Calibration | Not Required |
| Water Resistant | Resistant (up to 1 meter for 30 minutes) |
*40 days at 30Hz sample rate. Recording time is reduced with increased sample rates. Device can record approximately 16 days at 80Hz. See manual for details.