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压力测量

一个压力表的内部结构

目前已有许多技术开发用于进行压力和真空测量页面存档备份,存于互联网档案馆)。用于测量压力的仪器,通常被称为测压仪表真空仪表

压力计也可以是指一个压力的测量仪器,通常仅限于测量接近于大气的压力。实际上“压力计”一词经常被用来特指一类仪器,即主要利用液柱来测量在流体静力学条件下的压力。

真空仪表则是用来衡量真空条件下的压力,通常再进一步划分为两类:高真空、低真空(有时或是超高真空)。大多数用於衡量真空状态的测量技术,存在一个重叠的技术适用压力范围。结合几种不同类型的规范标准,通常仪表的连续测量范围为自10毫巴到10 -11 毫巴内。

單位

[编辑]
壓力單位
帕斯卡 工學大氣壓 标准大气压
(毫米汞柱)
磅力每平方英寸
Pa bar at atm Torr psi
1 Pa 1 N/m2 10−5 1.0197×10−5 9.8692×10−6 7.5006×10−3 145.04×10−6
1 bar 105 106 dyn/cm2 1.0197 0.98692 750.06 14.5037744
1 at 0.980665 ×105 0.980665 1 kp/cm2 0.96784 735.56 14.223
1 atm 1.01325 ×105 1.01325 1.0332 1 760 14.696
1 Torr 133.322 1.3332×10−3 1.3595×10−3 1.3158×10−3 ≈ 1 mmHg 19.337×10−3
1 psi 6.895×103 68.948×10−3 70.307×10−3 68.046×10−3 51.715 1 lbF / in2


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压力测量
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