Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

How to Build a Vacuum Spring-Transport Package for Spinning Rotor Gauges



James A. Fedchak, Julia K. Scherschligt, Makfir Sefa


The spinning rotor gauge (SRG) is a high-vacuum gauge often used to as a secondary or transfer standard for vacuum pressures in the range of 1.0 × 10-4 Pa to 1.0 Pa. In this application, the gauges are frequently transported to laboratories for calibration. To assure calibration stability, a spring transport mechanism is often used to immobilize the rotor and keep it under vacuum during transport. It is important to transport the spring-transport mechanism using packaging designed to minimize the risk of damage during shipping. We give a detailed description of how to build a robust spring-transport mechanism and shipping container. Together these form a spring-transport package. We tested our design using drop-tests and found the performance to be excellent. Our spring-transport mechanism is designed to keep the rotor immobilized when experiencing shocks of several hundred g, while our shipping container assures that the mechanism will not experience shocks greater than about 100 g during common shipping mishaps (as defined by industry standards).
Journal of Visualized Experiments


Spinning Rotor Gauge, Spring-Transport Mechanism, High-Vacuum Calibrations, Metrology, Key Comparison, Vacuum Gauge, Gauge Stability


Fedchak, J. , Scherschligt, J. and Sefa, M. (2016), How to Build a Vacuum Spring-Transport Package for Spinning Rotor Gauges, Journal of Visualized Experiments, [online], (Accessed June 14, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 7, 2016, Updated November 10, 2018