The torr equals 1/760 atm โ approximately 133.32 Pa. Essentially equivalent to mmHg but defined slightly differently. Used in vacuum-system engineering and older physics.
Real-world: Low-vacuum: 760 to 25 torr. High-vacuum: 10โปยณ to 10โปโน torr. Semiconductor fabrication: often below 10โปโถ torr.
Read full torr reference โThe pascal is the SI unit of pressure โ one newton per square metre. Named after Blaise Pascal. 1 Pa is a very small pressure; atmospheric pressure is about 101,325 Pa. Pressure readings in engineering are usually in kPa or MPa.
Real-world: Atmospheric pressure: 101,325 Pa. Conversation level: 0.001 Pa sound pressure. Truck tyre: 900,000 Pa.
Read full pascal reference โ