Bio-Sensors, Glenn, Friendship 7


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

This Bio-Harness Assembly was worn under the Mercury pressure suit and was worn by John Glenn during his historic Friendship 7 flight on February 20, 1962.

The components consisted of an electrocardiograph signal conditioner, an impedance pneumograph signal conditioner and a DC-DC converter. These instruments monitored the physiological functions of the astronaut. The sensor attachment in the helmet was for respiration count.

Collection Item Long Description:

Inventory Number


Credit Line

Transferred from NASA - Manned Spacecraft Center


Country of Origin

United States of America


  • Sensors: Rubber, aluminium
  • Wires: Plastic-coated copper wire
  • Microphone: aluminium


3-D (As Displayed): 61 × 3.8 × 1.3cm (24 × 1 1/2 × 1/2 in.)

Data Source

National Air and Space Museum

Restrictions & Rights

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