Precision Analytical Masses (ASTM Class 1)

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 weights are highly resistant to corrosion thanks to an alloyed stainless steel and among the finest in state primary standards for manufacturing.

The class 1 precision weights 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.

Key Features

  • ASTM internationally recognized weight specifications
  • Alloy 8 Stainless Steel
  • 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 No. Alt. Part No. Mass Unit of Measure Your Cost Purchase
WEIGHT CLASS 1 5MG 1 EA
TRO7034-1
EF7092F 5 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 MG PREC CA
OHS80781101
1 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 PREC CALBR
OHS80781133
10 g Each
$119.79
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 200MG 1 EA
TRO7028-1
EF7092B 200 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 10MG 1 EA
TRO7033-1
EF7092E 10 mg Each
$144.89
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 MG PREC CA
OHS80781123
500 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 PREC CALBR
OHS80781135
20 g Each
$119.79
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 20MG 1 EA
TRO7032-1
EF7092D 20 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 MG PREC CA
OHS80781103
2 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 PREC CALBR
OHS80781141
100 g Each
$140.21
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 5G 1 EA
TRO7022-1
EF7097A 5 g Each
$119.79
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 PREC CALBR
OHS80781139
50 g Each
$132.79
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
STNLSTEL ASTMCLAS 1 PREC CALBR
OHS80781125
1 g Each
$100.29
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 50MG 1 EA
TRO7030-1
EF7092C 50 mg Each
$99.36
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock
WEIGHT CLASS 1 2G 1 EA
TRO7024-1
EF7097D 2 g Each
$108.64
Add to Cart This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you'd like us to keep stock in the future In Stock