C series CrNi foil strain gauges for measurements at extreme temperatures
- Picture: Tensile force measurement using C series strain gauges at low temperatures (permafrost)
Series C strain gauges (SGs) with 1 or 2 measuring grids are specially designed for use at extreme temperatures (-269 °C to +250 °C) and provide an adapted temperature response in the range from -200 °C to +250 °C. Series C strain gauges also feature flexible use and are therefore easy to work with.
Types LC1 and LC6 are linear strain gauges for strain measurements in one direction.
Type XC1 is a 0°/90° rosette for analyzing biaxial stress states with known principal strain direction.
Type RC1 is a 0°/45°/90° rosette for analyzing a biaxial stress state with unknown principal strain direction.
Series C strain gauges are available in nominal (rated) resistances of 120 and 350 ohms with different temperature responses adapted for steel or to customer specification.
The measuring grid consists of a special CrNi alloy; the material of the measuring grid carrier is polyimide.
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 C series strain gauges
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Key Features
- The specialist for extreme temperatures (-269...+250°C)
- Temperature response with matching in the range of -200...+250°C
- Flexible, therefore easy to handle
- Material: Polyamide
- Measuring grids: 1, 2, 3
- Resistance (Ohm): 120, 350
