Related Experiment Video
Updated: Jul 25, 2026
07:22
Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
Published on: April 10, 2017
9.7K
An Intercomparison of Pressure Standards Between LNE and NBS
R G Driver1, J C Houck1, B E Welch1
1National Bureau of Standards, Washington, DC 20234.
Journal of Research of the National Bureau of Standards (1977)
|September 27, 2021
Summary
A comparison between the Laboratoire National d'Essais (LNE) and the National Bureau of Standards (NBS) piston gages showed excellent agreement in pressure measurements. Results were well within the expected uncertainty, confirming reliable pressure calibration methods.
Area of Science:
- Metrology
- Pressure Measurement Standards
Background:
- Accurate pressure calibration is crucial for industrial and scientific applications.
- Intercomparison of primary and transfer standard piston gages ensures measurement traceability and consistency.
Purpose of the Study:
- To intercompare a transfer piston gage from LNE with a primary standard piston gage from NBS.
- To validate the effective area computation and pressure generation capabilities of the LNE gage.
Main Methods:
- Performed an intercomparison of piston gages over a pressure range of 0.4 to 3.9 MPa.
- Calculated the effective area of the LNE gage using data from both laboratories.
- Averaged the pressures generated by the two piston gages for comparison.
Main Results:
- Agreement in effective area computation between LNE and NBS was within 6.4 ppm.
- Agreement in average generated pressures was within 3.3 ppm.
- Both results were significantly better than the estimated uncertainties (NBS: 30 ppm, LNE: 24 ppm).
Conclusions:
- The LNE transfer piston gage demonstrates high accuracy and reliability.
- The intercomparison validates the metrological capabilities of the LNE gage against a primary standard.
- This study supports international consistency in pressure metrology.
Related Concept Videos
02:57Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer
Gas pressure is caused by force exerted by gas molecules colliding with the surfaces of objects. Although the force of each collision is very small, any surface of an appreciable area experiences a large number of collisions in a short time, which can result in high pressure.
01:10Units and Standards of Measurement
A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
Measurements of physical quantities are...
Measurements of physical quantities are...
01:21Sites for measuring blood pressure
Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
The Brachial Artery: Primary Site for Blood Pressure Measurement
01:20Pressure Gauges
Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
01:10Units and Standards of Measurement
A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
Measurements of physical quantities are...
Measurements of physical quantities are...
01:16Measurement of Fluid Pressure
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...