Technical atmosphere
A technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter.
The symbol "at" clashes with that of the katal (symbol: "kat"), the SI unit of catalytic activity; a kilotechnical atmosphere would have the symbol "kat", indistinguishable from the symbol for the katal. It also clashes with that of the non-SI unit, the attotonne, but that unit would be more likely be rendered as the equivalent SI unit, the picogram.
Pressure Units
|
|
pascal
(Pa)
|
bar
(bar)
| technical atmosphere
(at)
|
atmosphere
(atm)
|
torr
(Torr)
| pound-force per
square inch
(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
| 100,000
| ≡ 106 dyn/cm2
| 1.0197
| 0.98692
| 750.06
| 14.504
|
| 1 at
| 98,066.5
| 0.980665
| ≡ 1 kgf/cm2
| 0.96784
| 735.56
| 14.223
|
| 1 atm
| 101,325
| 1.01325
| 1.0332
| ≡ 1 atm
| 760
| 14.696
|
| 1 torr
| 133.322
| 1.3332×10−3
| 1.3595×10−3
| 1.3158×10−3
| ≡ 1 Torr; ≈ 1 mmHg
| 19.337×10−3
|
| 1 psi
| 6,894.76
| 68.948×10−3
| 70.307×10−3
| 68.046×10−3
| 51.715
| ≡ 1 lbf/in2
|
Example reading: 1 Pa = 1 N/m2 = 10−5 bar = 10.197×10−6 at = 9.8692×10−6 atm, etc.
Note: mmHg is an abbreviation for millimeters of mercury.
[edit] External links
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