Abstract
An eight-page illustrated folder received from Messrs. Negretti and Zambra, Ltd., 122 Regent Street, London, W.1, describes the Negretti and Zambra low-pressure amplifier and electro-pneumatic converter. The low-pressure amplifier is a pneumatic means of amplifying a very low pressure to a pressure of 5 lb./in.2 and transmitting the result to a receiving instrument. It can be used for measuring or controlling absolute pressure, differential pressure, air or gas flow, air – gas ratio and specific gravity. The electro-pneumatic converter converts the voltage of a thermocouple or similar generator to a pressure of 1–5 lb./in.2, thus furnishing sufficient force to actuate a recording mechanism. It can be used for humidity measurement and control.
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Low-Pressure Amplifier arid Electro-pneumatic Converter. Nature 160, 325 (1947). https://doi.org/10.1038/160325c0
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DOI: https://doi.org/10.1038/160325c0