Series V – encapsulated strain gauges with a 3-m stranded connection wire
- Picture: Experimental investigations on a railway track
Series V encapsulated strain gauges provide a high degree of mechanical protection as well as a PVC-insulated stranded connection wire 3 m in length.
Type LV41 is an encapsulated linear strain gauge for strain measurements in one direction.
Type XV91 is a 0°/90° rosette for analyzing biaxial stress states with known principal strain direction.
Type RV91 is a 0°/45°/90° rosette for analyzing a biaxial stress state with unknown principal strain direction.
Series V strain gauges are available with a nominal (rated) resistance of 120 ohms with temperature responses adapted for steel.
Temperature range | Direction of strain | Special protection available? | Connection possibilities |
- 269 °C … + 200 °C | Uniaxial | Yes | Stranded connection wire |
Tips for selecting strain gauges
The right measuring grid length: The measuring grid length depends on the aim of measurement, since the result of a measurement with strain gauges (SGs) will be determined as the average of strains. In general, measuring grid lengths of 3 to 6 mm represent a good solution.
Long measuring grids are recommended where there is an inhomogeneous material such as e.g. concrete or wood. A long strain gauge will bridge the inhomogeneities of the workpiece and return the strain underneath the measuring grid as the measurement result.
Short measuring grids are suitable for detecting a local strain state. They are therefore suitable for determining strain gradients (strain gauge chains), the maximum point of notch stresses and similar stresses.
The right resistance: The selection of the resistance depends on the constraints of the measurement task. 120-ohm strain gauges are relatively insensitive to fluctuations in the insulation resistance, for example due to the effects of moisture.
The advantage of higher impedance strain gauges is that they produce less specific heat due to the lower measuring current. In addition they are less sensitive to resistances in the connecting cables to the measuring amplifier. There is also a disadvantage that higher impedance strain gauges may be more sensitive if noise pulses are received.
Customer-specific strain gauges
Do you have special requirements that are not adequately covered by any of the strain gauges in our standard program? Are you looking for an equivalent strain gauge for the product you are current using? Have you designed your own strain gauge? Contact us, we will produce customized strain gauges according to your requirements! From quantities of 20 packages and up.
Get a quote for V series strain gauges
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Key Features
- Encapsulated strain gages
- 3m stranded connection wire, PVC insulated
- High mechanical protection
- Material: Polyimide / Constantan foil
- Measuring grids: 1, 2, 3
- Resistance (Ohm): 120; connection leads inclusive
