10torr

10torr is a pressure value expressed with the torr unit, a legacy unit of vacuum measurement. The torr is defined as 1/760 of standard atmospheric pressure. Since 1 atmosphere is exactly 101,325 pascals, 1 torr equals about 133.322 pascals. Therefore, 10 torr is about 1,333 pascals and roughly 13.3 millibars.

In practice, the torr is commonly used in vacuum science and related disciplines such as electron microscopy, thin-film deposition, mass spectrometry, and leak testing. Although the pascal is the SI base unit for pressure, many instruments and historical data report pressures in torr or its submultiples (milliTorr, microTorr), due to convention and equipment calibration.

The term 10torr, when written without a space, is simply a shorthand representation of ten torr. In formal documentation, it is typically written as "10 torr" to indicate the unit explicitly.

History and naming: The torr is named after Evangelista Torricelli, credited with early work on vacuum and atmospheric pressure. The standard atmosphere concept defines 1 atm as 760 torr, linking the two units. While modern pressure measurement increasingly uses pascals and bar, the torr remains in common use for practical vacuum measurements and in historical or equipment specifications.

See also: Torr, Vacuum, Atmospheric pressure, Pressure measurement.