LE11 – encapsulated strain gauge with stranded wire: moisture proof and resistant against chemicals
LE11 is an encapsulated strain gauge (SG) with stranded wire. It features IP67 degree of protection (chemical resistance of the adhesives used is in compliance). A Teflon-insulated stranded connection wire 1 meter long is included in the scope of supply.
The LE11 strain gauge is encapsulated on all sides in a special plastic material and is therefore moisture proof and resistant against chemicals (with the exception of highly concentrated acids such as sulfuric or nitric acid). LE11 also features excellent zero signal stability with changing moisture.
LE11 comes with your choice of a 2-wire or 4-wire connection. The nominal (rated) resistance is 350 ohms and the temperature response is adapted for steel.
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.
Product Literature
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Key Features
- IP67 protection
- 1 m Teflon insulated stranded connection wire
- Moisture proof and resistant against chemicals due to full encapsulation in special plastic material
- Excellent zero signal stability with changing moisture
- 2-wire or 4-wire circuit alternatively
- Material: special plastic material
- Measuring grids: 3 mm
- Notes: 2 or 4 teflon-insulated wires
- Resistance (Ohm): 350
