Tag: Actigraph
Actigraph GT3X Review
by daniel on Oct.25, 2009, under Research
Many of you reading this article probably encountered this product the same way that we initially did, in a journal article under the methods section. This article is intended to give you an idea of product from a feasibility standpoint from an experienced computer technician and researcher.
Disclosure statement: I am not affiliated with Actigraph in any way and have received no compensation for this review.
Actigraph GT3X
MSRP $335
The Actigraph GT3X is a tri-axial accelerometer whose claim to fame lies in its very accurate movement filter whose primary purpose to differentiate actual steps and movement from any other background noise movement that may occur while wearing the device. It is capable of measuring very small amounts of movement such as those generated by the elderly and other home-bound subjects. This device’s data is widely accepted in research circles throughout the scientific community.
To get up and running with a basic kit will run you $706 ($349 software + $7 USB cable+ $335 GT3X+ $15 Elastic Band).
Closeup of the Device
The following are my impressions of the device and its ActiLife software.
Pros:
- Incredibly accurate
- Very long battery life
- Lightweight
- Noiseless
- Intuitive and easy to use software
- Lexan case (though I would like to see aluminum or magnesium)
- Graphical display of steps and movement along the various axes.
- Direct import of raw movement data into excel tables
- Quick shipping, friendly & prompt staff
Cons:
- Not waterproof
- Slow download speed (3-7 minutes)
- Poorly designed belt mounting loops
- Expensive proprietary accessories (elastic belts, USB cables, cases)
- Software NOT included with purchase of device
- USB cables not included with purchase of device
The Actigraph GT3X is a transparent red block of plastic (judging by density, hardness, and malleability the material feels very similar to Lexan) and electronics roughly the size of a Zippo lighter. It has a weather seal along its main joint and a USB port with a rubber plug that in general won’t immediately fit and create a snug seal. Looking at the workmanship I was immediately struck by the manufacturer’s choice of form over function. Sleek lines, rounded edges, and a carefully recessed rubber plug for the USB port do little for me whose main concern would be device’s robustness.
