Precision Analytical Masses (ASTM Class 1)

Troemner Precision Analytical Masses (ASTM Class 1) is recognized by the National Institute of Standards and Technology (NIST), the American Society for Testing and Materials (ASTM) and the International Organization of Legal Metrology (OIML) for its precision weights and mass standards. The weights can range from the very precise, highly polished one and two-piece stainless steel weights to 5,000 lb cast-iron weights.

The ASTM Class 1 weights are appropriate for calibrating high precision analytical balances with a readability as low as 0.1 mg to 0.01 mg. In addition, these weights can be used as a reference standard in calibrating other weights. These Troemner™ weights are highly resistant to corrosion thanks to an alloyed stainless steel available only to Troemner™ and among the finest in state primary standards for manufacturing.

The class 1 precision weights (and Troemner™ UltraClass 2, 3 and 4) are 1 g and larger, and are produced from two pieces of material: the body of the weight and the knob of the weight. This lifting knob is specifically designed for use with forceps, tweezers, and other lifting devices.

Troemner™ is the only private mass metrology laboratory in the world accredited for E1 measurements with uncertainties at 1/3 the E1 tolerance. The company is home to a seasoned staff of metrologists and high-end calibrators offering the most precise balances and finest mass comparators on the market.

Key Features

  • ASTM internationally recognized weight specifications
  • Troemner Alloy 8 Stainless Steel, fine and specific to Troemner weights
  • Tolerances and design restrictions for each class 
  • Slightly recessed weight bottoms to limit contact with water
  • Precise weight heads and necks allowing for sure grip to forceps or weight lifters
  • Class 1 weights can be used to calibrate certain Class I and Class II balances and scales as specified in OIML R 76. Class 1 weights can also be used to calibrate Class 2 weights

Filter
Item Mass Unit of Measure Price Purchase
EF7092B
7028-1
200 mg Each
$85.95
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EF7092C
7030-1
50 mg Each
$85.95
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EF7097D
7024-1
2 g Each
$86.95
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EF7092D
7032-1
20 mg Each
$85.95
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EF7099X
7021-1
10 g Each
$91.95
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EF7092G
7036-1
2 mg Each
$85.95
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EF7097G
7025-1
1 g Each
$86.95
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EF7092H
7037-1
1 mg Each
$85.95
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EF7099Q
7018-1
50 g Each
$101.95
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EF7092E
7033-1
10 mg Each
$85.95
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EF7092F
7034-1
5 mg Each
$85.95
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EF7097A
7022-1
5 g Each
$92.95
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EF7099U
7020-1
20 g Each
$91.95
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EF7099M
7017-1
100 g Each
$123.95
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EF7092A
7026-1
500 mg Each
$85.95
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