vacuum gage
Definition
Noun: A vacuum gage is a scientific instrument designed to measure pressures that are below atmospheric pressure. It indicates the degree of vacuum, or negative pressure, within a sealed system.
Usage
A vacuum gage is used to monitor and quantify the level of vacuum in a closed space. It is essential in laboratories, industrial processes (like semiconductor manufacturing), and HVAC systems to ensure proper conditions.
Examples
- The technician checked the vacuum gage to ensure the chamber had reached the required pressure for the experiment.
- A reading on the vacuum gage confirmed the system was properly sealed and evacuated.
Advanced Usage
- Technical Context: In physics and engineering, a vacuum gage is critical for processes requiring specific low-pressure environments, such as in vacuum coating or freeze-drying.
- Calibration: For accurate measurements, a vacuum gage must be regularly calibrated against a known standard.
Variants and Related Words
- Vacuum gauge: An alternative spelling for "vacuum gage." Both terms are used interchangeably.
- Manometer: A more general instrument for measuring pressure, which can sometimes be adapted to measure vacuum.
- Pressure gauge: A general term for any instrument that measures pressure, which may include the ability to measure vacuum.
Synonyms
- Vacuum meter
- Pressure indicator (when configured for sub-atmospheric pressure)
Related Phrases
- Under vacuum: A state described by the measurement from a vacuum gage.
- The container was placed under vacuum, as shown by the gage.
- Gage reading: The specific value indicated by the instrument.
- The gage reading showed a pressure of 10^-3 torr.
Noun
-
a gauge for indicating negative atmospheric pressure
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