Dynamic concrete strain gauges measure axial strain in the concrete under high frequency (dynamic) conditions. Utilizing four active elements of a Wheatstone bridge circuit, this concrete strain gauge compensates for temperature, rejects bending strain (may also be configured to measure bending and reject axial strains), compensates for lead resistance, and provides a sensor that is easily adaptable to most data acquisition systems without requiring additional signal conditioning. Owing to their low profile design, these sensors can be used in concrete pavements, columns, walls, bridge elements or wherever dynamic strains need to be measured. Each sensor is provided with end washers and nuts and is individually calibrated and supplied with fabrication quality-control documentation.
| Bridge Circuit | Four active 350Ω strain gages |
| Range | ±2000 microstrain |
| Sensitivity at 1000 ME | ~1.3mVout/Vexc |
| Excitation | Up to 10 Volts |
| Temperature Range | -34° to 100° C |
| Lead Wire | 24 AWG, twisted four-wire with shielding |
*Specifications subject to change without notice on account of continued product development
| Datasheet |
| Outline Drawing |
Strain measurement becomes challenging in concrete structures due to aggregate components. Our concrete strain gauges are designed to assure precise measurements on concrete structures. The resistance of the concrete strain gauge depends on the cross-sectional area and length of a conductor and is indicated by the formula R=L/A (where R is resistance, L is length, and A is the cross-sectional area). The length of the conductor will depend on its shape and size, and this impacts the resistance and cross-sectional area.
The reading of the electrical resistance from the gauge will help you understand the stress-induced on the object. The input voltage is applied to the input terminals of the concrete strain gauge and the output can be read at the output terminals.
