SGD-BIAXIAL

Supported Applications

The Omega SGD-BIAXIAL series consists of precision strain gage tee stacked rosettes designed for measuring axial strain. These biaxial, stacked 0 ° - 90 ° corner T-rosette configurations feature a two-element arrangement suitable for applications requiring directional strain analysis.

Operating Conditions & Performance

The series is available in small, medium, and large patterns with nominal resistances of 120 Ω and 350 Ω. Maximum permitted bridge energizing voltage (Vrms) varies by model configuration:

• SGD-2 Series: Ranges from 3 Vrms to 7 Vrms depending on resistance, termination, and temperature compensation.
• SGD-3 Series: Ranges from 4.5 Vrms to 10 Vrms.
• SGD-7 Series: Ranges from 9 Vrms to 20 Vrms.

Grid dimensions are defined by active gage length (A), active gage width (B), matrix length (C), and matrix width (D). For example, the SGD-2 pattern features a grid with A = 2.00 mm, B = 1.10 mm, C = 5.60 mm, and D = 5.60 mm.

Dimensional Specifications

• SGD-2 (Small): Grid A: 2.00 mm; B: 1.10 mm; C: 5.60 mm; D: 5.60 mm.
• SGD-3 (Medium): Grid A: 3.00 mm; B: 1.70 mm; C: 7.10 mm; D: 7.10 mm.
• SGD-7 (Large): Grid A: 6.50 mm; B: 3.10 mm; C: 11.40 mm; D: 11.40 mm.

Note: Inch equivalents are provided in the specification table for specific models (e.g., SGD-2/120-XY13 lists A as 0.079 inch).

Configuration Options

The series supports multiple configuration options to accommodate different installation and measurement requirements:

• Nominal Resistance: 120 Ω or 350 Ω.
• Termination Types: Ribbon Leads (e.g., XY1, XY3) or Solder Pads (e.g., XY4).
• Temperature Compensation: Steel (ST) or Aluminum (AL).
• Term Pad Options: BTP-2 for SGD-2 models, BTP-3 for SGD-3 models, and BTP-4 for SGD-7 models.

Custom-designed strain gages are available with no minimum quantities; consult engineering for specific requirements. Accessories are also offered online.

Key Product Differences

Variants within the SGD-BIAXIAL series differ primarily by grid size, resistance value, termination method, and temperature compensation material:

• Grid Size (Pattern): Models are designated as SGD-2, SGD-3, or SGD-7 corresponding to small, medium, and large patterns respectively.
• Resistance: Each grid size is offered in 120 Ω and 350 Ω nominal resistance options.
• Termination & Compensation Codes:

The model number guide follows the format SGD-<SIZE>/<RESISTANCE>-XY<TERMINATION><TEMP_COMP>. For example, SGD-7/350-XY11 denotes a 6.5 mm grid (large pattern), 350 Ω resistance, ribbon leads termination, and steel temperature compensation.

Dual-unit dimension listings in the source table present metric values for some rows and inch equivalents for others within the same column; these are preserved exactly as printed without conversion or pairing across units not explicitly linked in a single cell.