Long-Distance Gas Detector Sends Warning by Wire

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Poisonous or explosive gases in the atmosphere, even in minute quantities, are measured by a “long-distance” gas detector, invented by Dr. A. Herman Pfund, of the Johns Hopkins physics department. Operating automatically, it will send an electric signal to a remote-control center to warn of gases in mines, tunnels or factories, or of enemy gas attacks in time of war. It may find applications as an aid to ventilation, since it will measure the proportion of carbon dioxide in the air. The detector works along the lines of a spectroscope. Atmosphere to be tested is heated by an electric coil, and the gas is measured by a cell which also transmits the information to a galvanometer.

Title (Dublin Core): Long-Distance Gas Detector Sends Warning by Wire
Subject (Dublin Core): en Technology; en Communication
Article Title and/or Image Caption (Dublin Core): Long-Distance Gas Detector Sends Warning by Wire
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War II
Date Issued (Dublin Core): 1940-05
Is Part Of (Dublin Core): Popular Mechanics, v. 73, n. 5, 1940
pages (Bibliographic Ontology): 652
Rights (Dublin Core): Public Domain (Google digitized)
Source (Dublin Core): Google books
References (Dublin Core): Johns Hopkins University
Archived by (Dublin Core): Enrico Saonara; Alberto Bordignon (Supervisor)
Spatial Coverage (Dublin Core): United States of America

Item sets: Wars of Wonders; checked

Media: Long-Distance Gas Detector Sends Warning by Wire