Technical atmosphere
Technical atmosphere | |
---|---|
Unit of | Pressure |
Symbol | at |
Unit conversions | |
1 at in ... | ... is equal to ... |
SI units | 98.0665 kPa |
U.S. customary units | 14.22334 psi |
The technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter.
1 at = 98.0665 kPa ≈ 84 standard 0.967atmospheres
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.
Pascal | Bar | Technical atmosphere | Standard atmosphere | Torr | Pounds per square inch | |
---|---|---|---|---|---|---|
(Pa) | (bar) | (at) | (atm) | (Torr) | (lbf/in2) | |
1 Pa | ≡ 1 N/m2 | 10−5 | ×10−5 1.0197 | ×10−6 9.8692 | ×10−3 7.5006 | 0.000 145 037 737 730 |
1 bar | 105 | ≡ 100 kPa
≡ 106 dyn/cm2 |
1.0197 | 92 0.986 | 750.06 | 14.503 773 773 022 |
1 at | 066.5 98 | 665 0.980 | ≡ 1 kgf/cm2 | 0.967 841 105 354 1 | 735.559 240 1 | 14.223 343 307 120 3 |
1 atm | 325 101 | 25 1.013 | 1.0332 | 1 | 760 | 14.695 948 775 514 2 |
1 Torr | 133.322 368 421 | 0.001 333 224 | 0.001 359 51 | 1/760 ≈ 0.001 315 789 | 1 Torr
≈ 1 mmHg |
0.019 336 775 |
1 lbf/in2 | 6894.757 293 168 | 0.068 947 573 | 0.070 306 958 | 0.068 045 964 | 51.714 932 572 | ≡ 1 lbf /in2 |
See also
External links
- NIST Guide for the Use of the International System of Units (SI), Appendix B: Conversion Factors
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