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torr

torr

1 7.6
A unit for measuring pressure equal to 1/760 of the air pressure at sea level
  • noun
  • /tɔr/
  • Specialized
translation icon : torr
  • Micropole Trademark RGA operates up to 10-2 Torr without differential pumping.
  • 10 torr
  • 1000 torr
  • vacuum of 0.75 torr

Examples

  • Fuel pressure... 1800 torrs.

  • High-performance, economical controllers for Bayard-Alpert and cold cathode gauges, covering 10-11 torr to 1000 torr.

    Academic text (1997)
  • Achieve levels of 10 to 10^-13 Torr.

    Academic text (1997)
  • Showing oil-free diaphragm vacuum pumps, ultimate vacuum to 0.6 Torr, Chemical Series.

    Academic text (1997)
  • UniDry pump is 34 cfm with an ultimate vacuum of 3 by 10-2 torr.

    Academic text (1997)
  • Prior to measurement, the sample was degassed at 200 °C and 10^-6 Torr for 8 h.

    Academic text (2018)
  • A high-resolution digital output, along with the analog-equivalent signal, provides accurate, repeatable pressure measurements from 0.02 to 1000 torr.

    Academic text (2002)
  • An off-the-shelf precision positioning system complies with a vacuum environment of 10^-6 Torr and low magnetic field interference.

    Academic text (1995)
  • With a pumping speed of 63 L/min and an ultimate vacuum of 0.75 torr, the MD-4 VARIO-SP provides powerful backing of modern wide-range turbo pumps.

    Academic text (2003)
  • The pressure in the chamber was measured at 50 torr, indicating a low vacuum level.

Synonyms

mm Hg
vstorr
  • Specialized
1 3.9

A measure of pressure used for blood and air, based on mercury height

is the same measure but defined relative to the standard atmosphere
millimeter of mercury
vstorr
  • Specialized
1 5.0

A unit for measuring pressure used for blood pressure and barometers

is the same measure but defined by a fraction of the standard atmosphere

Surface Forms

torr singular
torrs plural

Etymology

The word torr is named after the Italian scientist Torricelli, who used a tube of mercury to measure air pressure. So a torr is a unit of 'pressure' and the name reminds us of Torricelli's experiments showing how air pushes on a column of mercury.