…By using a specially precision-finished piston-cylinder system with a very good fit, it is possible to use gases such as air or nitrogen instead of oil. This is called an air deadweight type pressure gauge. Because the viscous resistance acting on the piston is small, the air type has a high sensitivity of about 10 −5 and is suitable for precise measurement of low pressures up to about 5 MPa. … *The following is a partial explanation of terms that refer to "pneumatic deadweight tester." Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…特別に精密に仕上げたはめ合いの非常によいピストン‐シリンダー系を用いれば,油の代りに空気や窒素などの気体を使用することができる。これを空気式重錘型圧力計という。空気式はピストンに働く粘性抵抗が小さいため約10-5の高感度をもち,約5MPaまでの低圧力の精密測定に適する。… ※「空気式重錘型圧力計」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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