Strain Gauge Selection Guide
Choose the Right Strain Gauge for Precise and Reliable Stress Analysis
At Proact IMS, we help industries and researchers make informed choices when selecting the right strain gauge for their application. Whether you're measuring microstrain in aerospace materials, monitoring bridge deflection, or performing dynamic load tests in automotive QA labs — selecting the correct strain gauge is crucial for reliable results.
Key Selection Criteria
1. Type of Measurement
- Uniaxial / Linear Strain Gauges – For single-direction load and stress measurement.
- Biaxial / Rosette Gauges – For evaluating complex, multidirectional stress fields.
- Shear & Torsion Gauges – For analyzing stress in shafts and rotary components.
2. Gauge Configuration
- Quarter-Bridge: Basic, cost-effective setup using a single direction gauge.
- Half-Bridge: Good thermal compensation.
- Full-Bridge: High sensitivity, noise rejection—ideal for dynamic applications.
3. Resistance Values
- Typical: 120Ω, 350Ω, 1000Ω
- Higher resistance means lower current draw and better thermal stability—ideal for long-term or sensitive applications such as for composites.
4. Environmental Conditions
- Cryogenic Temperature gauges for liquid nitrogen (-269°C and -196°C)
- High-Temperature Gauges (up to 800°C)
- Waterproof/Encapsulated Gauges for marine or humid areas.
- Measurement in magnetic field to cancel the electromagnetically induced noise
- Embedded type for internal strain measurement
- Low Elastic Modulus specimen for chemical plants or refineries
5. Base Material Compatibility
- Ensure correct backing material and adhesive for:
- Steel / Aluminum
- Concrete
- Carbon composites
- Plastics and polymers
- Wood
Types of Strain Gauges Offered
1. Uniaxial Foil Strain Gauges
- Most widely used
- High stability, accuracy, and repeatability
- Used in civil structures, machinery, and aerospace components
2. Rosette Strain Gauges
- Three grids at 0°, 45°, and 90°
- Ideal for identifying principal strains in unknown stress fields
- Used in structural R&D and composite analysis
3. High-Temperature Strain Gauges
- Designed for extreme environments: turbines, engines, foundries
- Available in encapsulated or spot-welded formats
4. Bonded vs. Unbonded
- Bonded: Surface-mounted using adhesives (standard in field use)
- Unbonded: Used in force transducers and load cells
Typical Applications
- Bridge Stress Monitoring – Long-term monitoring with foil rosette gauges
- Engine Mount Testing – Foil gauges for small deformations
- Pipeline Structural Stress – High-temp strain gauges + pressure sensors
- R&D Testing Rigs – Full-bridge strain gauge networks with DAQ systems
- Composite Material Evaluation – Rosette gauges on CFRP or GFRP panels
Accessories & System Integration
- Signal conditioners and Wheatstone bridge circuits
- Adhesives, protective coatings, and surface prep kits
- Compatibility with DAQs of various brands and custom software
- Calibration and installation support by Proact IMS experts
Why Choose Proact IMS?
- Technical partner of TML - Japan who manufacturer high-quality strain gauges
- Extensive inventory for quick delivery
- Application engineering support for custom sensor configurations
- Field-tested in aerospace, infrastructure, and OEM QA labs
- Integrated packages: Gauges + Sensors + DAQ + software