Monitor, Actigraph Activity


Display Status:

This object is on display in the Moving Beyond Earth exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

The LSLE Activity Monitor (Actigraph) is a wrist-worn instrument that records body motion. The device uses a piezoelectric sensor to detect zero crossings. The zero crossing counts are stored in a 64K RAM memory chip that uses an interface unit to a PC for initialization and memory download. The interface unit is not flight-qualified so the analysis and initialization is performed on the ground. Memory capacity depends on the data packing option selected. The number of counts stored during a time period or epoch is programmed pre-flight. The packing options are optimized for expected activity (awake or sleep), memory capacity and battery life. The unit is powered by two 160 mAH lithium cells powers. The actigraph uses a wristband made of Nomex and Velcro to meet flight material requirements and ease of attachment in microgravity.

NASA transferred this monitor to the Museum in 2012.

Collection Item Long Description:

Inventory Number


Credit Line

Transferred from NASA Johnson Space Center

Country of Origin

United States of America


Aluminum, steel, brass, nylon, Velcro, adhesive decal


3-D: 9.5 × 8.9 × 4.4cm, 0.1kg (3 3/4 × 3 1/2 × 1 3/4 in., 1/4lb.)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum



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