This type of fire extinguisher was used in Apollo spacecraft and the Skylab space station. Several fire sensors and extinguishers were located in Skylab as a precaution in case of an open fire or a fire smoldering behind panels. This particular unit was not flown in space but was used in engineering tests. Transferred from NASA, the fire extinguisher in now mounted near the galley-wardroom of the backup Skylab orbital workshop displayed in the Museum.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.