Invar Master Bar for Strain Gauge

Invar Master Bar

Invar Master Bar

Model: HM-241
Price: $336.00
Metric Invar Master Bar

Metric Invar Master Bar

Model: HM-241F
Price: $337.00

The Invar Master Bar is required for verifying the calibration of HM-240 Strain Gauge. Models are available in either English or metric units. The bar is made of Invar nickel-iron alloy with a very low coefficient of thermal expansion. Threaded stainless steel inserts with 2, 4, 6, 8 and 10in or 5, 10, 15, 20, and 25cm spacing are used to verify gauge spacing.

HM-241 is marked in English measurements, while HM-241F is indicated in Metric.


  • Available in English or Metric models
  • Invar nickel-iron alloy has exceptional thermal stability
  • Stainless steel inserts to verify gauge spacing

Included Items:

  • Invar Master Bar, English or Metric
Material Invar nickel-iron alloy
Estimated Shipping Weight 2.0lb (0.91kg)

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Material Invar nickel-iron alloy
Estimated Shipping Weight 2.0lb (0.91kg)
Meets Standard(s):
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