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There are thousands of strain gages available from the various vendors. Selection among these choices can be overwhelming. This section is aimed at narrowing down the selection possibilities.

Principles of Selecting Strain Gages

Four principles should be considered in selecting strain gages. They are

  • Suitability for the operating and environmental conditions.
  • Accurate and reliable measurements.
  • Easy to install.
  • Minimum cost.
Strain Gage Parameters

Parameters for choosing strain gages are summarized as follows.

  • Gage Length
  - accuracy requirement - strain gradients
  - maximum strain (elongation) - installation (space and easiness)
  - heat dissipation    
  • Gage Pattern
  - uniaxial, biaxial, or multi-axial - strain gradients
  - heat dissipation - installation (space and easiness)
  • Gage Resistance
  - signal noise ratio - heat dissipation
  - lead-wire desensitization    
  • Gage Materials
  - gage wire sensitivity - backing (carrier)
  - adhesive - self-temperature-compensation
  • Optional Features
  - installation (easiness, speed)    
Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.