Technical Atmosphere
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Technical Atmosphere
Technical atmosphere
Unit ofPressure
Symbolat 
Conversions
SI units98.0665 kPa
U.S. customary units14.22334 psi

The technical atmosphere (symbol: at) is a non-SI unit of pressure equal to one kilogram-force per square centimeter.[1][2]

1 at  = 98.0665 kPa
? standard atmospheres

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 Bar Technical atmosphere Standard atmosphere Torr Pounds per square inch
(Pa) (bar) (at) (atm) (Torr) (lbf/in2)
1 Pa ? 1 N/m2 10-5 0.000 145 037 737 730
1 bar 105 ? 100 kPa

? 106 dyn/cm2

14.503 773 773 022
1 at ? 1 kgf/cm2 0.967 841 105 354 1 735.559 240 1 14.223 343 307 120 3
1 atm 1 760 14.695 948 775 514 2
1 Torr 133.322 368 421 0.001 333 224 0.001 359 51 ? 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

References

  1. ^ Dorf, Richard C. (2003-11-24). CRC Handbook of Engineering Tables. CRC Press. ISBN 9780203009222.
  2. ^ Suplee, Curt (2009-07-02). "Special Publication 811". NIST. Retrieved .

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