Detectors Collection

Lie detector 1923
American instrument for the detection of uttered fibs, falsehoods, and other untruths, based on responses of the subjects heart and lungs

Civilians crowding around a gas-detector table, Sept 1939
Four people inspecting a new gas-detector table, set up to indicate a gas attack shortly after the outbreak of war. The table was covered with a paint that changed colour in the presence of mustard

Mice as fume detectors on a submarine, WW1
White mice as fume detectors on board a submarine, WW1. An officer is giving the mice an airing on deck

Keelers Lie Detector
Leonard Keeler, of North Western University, USA, invents a lie detector based on blood pressure Date: 1937

D-Day - Metal Detectors in use after invasion
American GIs stroll through a captured village close to the Normandy coast following the invasion. Two metal detector operators check the road ahead of the troops for hidden/buried mines or booby

Troops of the Royal Canadian Engineers, Italy; Second World
Photograph showing men of the Royal Canadian Engineers, carrying mine-detectors, moving west of Ortona, Italy, during December 1943

Sound Detectors
Noise detectors used to sense approaching aircraft. These were originally used in World War One

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