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High Capacity Proving Rings

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The HG3901 & HG3902 High Capacity Proving Rings are designed for calibration of concrete testing machines. These proving rings with their low profile design are also designed for other application requiring high capacities. These proving rings are much lighter than other comparable capacities resulting in easier handling. Although the amount of deflection is reduced with this type of design, it is still sufficient to provide low uncer tainties with good readability. The rings have an uncertainty of .075% (.75 Ibf per 1000 Ibf of capacity), the readability is 1/10 division (.24% of full scale), and a sensitivity of 1/20 division (.012% of full scale). An adjustable vernier index is furnished with the proving rings that can be set to zero at the no-load condition for easier readings during calibrations. Approx. Ship Wt. 52 lb. and 70 lb.


Product #ProductNameStandardsLoad CapacityDimensions (DxH)
  HG3901Proving Ring High CapacityASTM E-74250000 lb8 3/4 x 10 1/2
  HG3902Proving Ring High CapacityASTM E-74400000 lb9 3/4 x 12