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This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
The U.S. perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury. 1 U.S. perm. = 0.659045 metric perms. ≈ 57.2135 ng·s −1 ·m −2 ·Pa −1. Metric perm. The metric perm (not an SI unit) is defined as 1 gram of water vapor per day, per square meter, per millimeter of mercury. 1 metric perm.
Inch of water. Inches of water is a non- SI unit for pressure. It is also given as inches of water gauge (iwg or in.w.g.), inches water column (inch wc, in. WC, " wc, etc. or just wc or WC), inAq, Aq, or inH2O. The units are conventionally used for measurement of certain pressure differentials such as small pressure differences across an ...
1 torr ≈ 1 mmHg [34] ±200 Pa ~140 dB: Threshold of pain pressure level for sound where prolonged exposure may lead to hearing loss [citation needed] ±300 Pa ±0.043 psi Lung air pressure difference moving the normal breaths of a person (only 0.3% of standard atmospheric pressure) [35] [36] 400–900 Pa 0.06–0.13 psi
A millimetre of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high, and currently defined as exactly 133.322 387 415 pascals [1] or approximately 133.322 pascals. [2] It is denoted mmHg[3] or mm Hg. [4][2]
Vacuum range Pressure in hPa () Pressure in mmHg () number density (Molecules / cm 3) number density (Molecules / m 3) Mean free path Ambient pressure 1013 759.8 2.7 × 10 19: 2.7 × 10 25
Barometer. A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather. Many measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries.
10 −1 to 10 −7 mbar ±2.5% of reading between 10 −7 and 10 −2 mbar 2.5 to 13.5% between 10 −2 and 1 mbar Transport Pirani (Wheatstone bridge) Thermal conductivity 1000 to 10 −3 mbar (const. temperature) 10 to 10 −3 mbar (const. voltage) ±6% of reading between 10 −2 and 10 mbar Fast Transport Thermocouple (Seebeck effect ...