Pressure measurement because atmospheric pressure is always changing and the reference in this case is fixed at 1 bar. To produce an absolute pressure sensor, the manufacturer seals a high vacuum behind the sensing diaphragm. If the process-pressure connection of an absolute-pressure transmitter is open to the air, it will read the actual barometric pressure. The SI unit for pressure is the pascal (Pa), equal to one newton per square metre (N·m or kg·m·s). This special name for the unit was added in 1971; before that, pressure in SI was expressed in units such as N·m. When indicated, the zero reference is
Pascal Lamy running and cycling. "The Relationship between WTO Law and General International Law" in the Lecture Series of the United Nations Audiovisual Library of International Law Pascal Lamy Pascal Lamy (born 8 April 1947) is a French political consultant and businessman. He was the Director-General of the World Trade Organization (WTO) until 1 September 2013. His appointment took effect on 1 September 2005 for a four-year term. In April 2009, WTO members reappointed Lamy for a second four-year term, beginning on 1 September 2009. He was then succeeded by Roberto Azevêdo. Pascal Lamy was also European Commissioner for Trade and is