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Mini Concrete Strain Gauge

The mini concrete strain gauge combines a constantan sensing grid with a phenolic-epoxy base to deliver highly accurate measurements with 120ohm resistance and ±0.01% precision. Designed for operation from -30°C to 60°C, this sensor supports reliable monitoring of concrete structures.
SKU: CCHN-SG-50AA
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Delivery date: 6-25 days

The concrete strain gauge features a compact design for convenient installation, simplifying bonding in concrete applications, with a durable phenolic-epoxy backing for stable performance in demanding engineering environments.

Specification

Model CCHN-BF120-50AA
Base Size 50 × 3.8 mm
Grid Size 55 × 7.5 mm
Sensing Grid Material Constantan
Base Material Phenolic Epoxy
Lead Wire 30 ± 2 (optional)
Nominal Value Tolerance 120 ± 3 Ω
Mean Value Deviation ≤ ±0.1 Ω
Operating Temperature -30℃ – 60 ℃
Gauge Factor 1.8 – 2.2
Gauge Factor Dispersion ≤ ±0.1 %
Thermal Output Coefficient ≤ 2 um/m/℃
Deviation From Average Thermal Output ≤ 30 ±um/m
Room Temperature Insulation Resistance 10000 MΩ
Room Temperature Strain Limit 2%
Mechanical Hysteresis 1.2 um/m
Fatigue Life ≥ 107(±1000)


Feature

  • Constantan Foil Sensing Element: The mini concrete strain gauge is made with constantan foil sensing material, providing stable output, high repeatability, and reliable strain transmission.
  • Precision-Etched Grid Design: Precision-etched grid with a compact base size ensures uniform strain distribution, ideal for small surfaces and stress concentration areas.
  • Resistance Stability: Featuring a dependable 120ohm resistance, this strain gauge offers precise measurements and excellent integration with standard Wheatstone bridge circuits, making it ideal for accurate and consistent data collection.
  • Wide Industrial Temperature Range: Available in -30°C to 60°C, maintaining reliable and consistent performance across typical industrial temperature conditions.
  • Low Thermal Sensitivity: Engineered with low thermal sensitivity, the concrete strain gauge exhibits minimal thermal output and tightly controlled dispersion, effectively reducing temperature-induced measurement errors.

Diagram

Concrete strain gauge diagram

Tips: Why choose the mini concrete strain gauge?

Its compact base enables easy installation in narrow spaces, stress concentration zones, and small concrete specimens where standard gauges are difficult to apply. The reduced footprint minimizes disturbance to the test surface, allowing strain to be captured more precisely and locally. This makes it especially effective for monitoring crack initiation areas, edge regions, and confined structural components, ensuring more accurate and reliable strain gauge measurement results.