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HBM Strain Gauges | High Temperature Strain Gauges | OMEGA
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M Series strain gauges have been specially developed
for high resistance to alternating loads at increased
strain levels and high temperatures up to 300°C
(572°F). They are foil strain gauges with measuring grids
made of a special nickel-chromium alloy. OMEGA/HBM
offer this special strain gauge with various geometries,
measuring grid lengths and temperature response
matching.
New materials offering high strength such as fiber
composites pose a major challenge for strain gauges
used for measurements specifically when pushing
components to their mechanical limit of performance.
Situations may arise where a strain gauge subjected to
alternating loads at increased load levels is weakened
and fails earlier than the component under test.
The M Series has been specially developed for high
resistance to alternating loads and allows for testing
of materials featuring high strength.
All M Series strain gauge types are available with
different measuring grid lengths:
• 1.5 mm: where space is a constraint or when highly selective measurement results are required
• 3 mm: for inhomogeneous materials and where space is a requirement or not
• 6 mm: for inhomogeneous materials and where space is not a requirement
The right measuring grid length: The measuring grid
length depends on the aim of measurement, since
the result of a measurement with strain gauges will
be determined as the average of strains. In general,
measuring grid lengths of 3 to 6 mm (0.06 to 0.24")
generates a better result.
Long measuring grids are recommended where there
is an inhomogeneous material such as concrete or
wood. A long strain gauge will bridge the inhomogeneity
of the work piece and return the strain underneath the
measuring grid as the measurement result.
Short measuring grids are suitable for detecting a local
strain state. Therefore, they are suitable for determining
strain gradients, the maximum point of notch stresses
and similar stresses.
Specifications
Strain Gage Construction–Foil Strain Gauge
Carrier:
Material: Glass fiber reinforced phenolic
Thickness: 35 ±10 µm
Grid Foil:
Material: CrNi
Thickness: 5 µm
Encapsulation:
Material: Polyimide film
Thickness: 25 ±5 µm
Connections: Solder pads with strain relief
Resistance: 350 and 1000 Ω
Resistance Tolerance: ±0.3%(1)
Gage Factor: Approximate 2.2 (specified on each package)
Gage Factor Tolerance: ±1.5% (for grid length <3 mm) ±0.7% (for grid length ≥3 mm)
Temperature Coefficient of the Gauge Factor: Specified on each package
Transverse Sensitivity: Specified on each package
Operating Temperature Range: -200 to 300°C (-328 to 662°F)
Temperature Response (Ferrite Steel): 10.8 ppm/K (6.0 ppm/°F)
Maximum Elongation:
Positive Direction: 10,000 µm (1%)
Negative Direction: 15,000 µm (-1.5%)
Minimum Bending Radius: 5 mm (0.20") for linear gauges 10 mm (0.39") for stacked rosettes
Bonding Material that Can Be Used: Z70 or EP310S
Fatigue Life (Test to Failure):
107 cycles at 2000 µm/m
106 cycles at 2200 µm/m
104 cycles at 3100 µm/m
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† All dollar amounts on this site are shown in US currency.
Note: † Maximum permitted effective excitation voltage specified for steel material.
Instructions for Use of Accessories shown under Product Manuals below.
All listed adhesives are specifically designed/approved to be used for the new M Series of strain gauges.
Safety Data Sheets for Accessories can be found (without "1-" Part Number prefix) at omega.com, Support, MSDS.
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Part Number Builder |
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Option Descriptions
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(1)
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Geometries
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Select LM1 for Linear strain gage with one measurement grid TM1 for Stacked T rosette with two measurement grids XM4 for V-shaped strain gage with two measurement grids RM8 for Rectangular strain gage rosette with three measurement grids RM9 for Stacked strain gage rosette with three measurement grids
(2)
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Measurement Grid mm(inch)
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Select 1.5 for Measurement Grid A 1.5 (0.06) 3 for Measurement Grid A 3 (0.12) 6 for Measurement Grid A 6 (0.24)
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NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
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Related Links -
Manual, Related Products
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Product Manual |
Download Rapid Adhesive (English/German/French) |
Download Two-component Epoxy resin adhesive (English/German/French) |
Download Accelerator for Z70 adhesive (English/German/French) |
Related Products |
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BTP-1, RES-120, SGB-36: |
Strain Gage Accessories: Resistance Wire, Bondable Terminal Pads (BTP), Bridge Completion Resistors |
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Resistance Wire: |
Resistance Wire and Heat-Curing Adhesive for Transducer Strain Gages |
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PST-4130: |
Regulated Power Supply for Transducers and Bridges, Adjustable 4 to 15 Vdc Output |
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