Reference Weights and Mass Standards

ASTM Individual Reference Calibration Weights

Reference Calibration Weights and Mass Standards Adjusted to Troemner UltraClass Tolerances
Troemner UltraClass Reference Calibration Weights and Mass Standards offer the tightest tolerances, lowest uncertainties, and all surfaces are polished to a perfect finish to meet or exceed ANSI/ASTM E617 tolerance and design restrictions. UltraClass calibration weights are manufactured from high grade stainless steels including Troemner Alloy 8 which possesses closely controlled density, low magnetic susceptibility, and corrosion resistance.
ASTM Individual Reference Calibration Weights Features
Troemner UltraClass offers high accuracy with tight tolerances and guaranteed uncertainties as low as 1/5 of the tolerance. Weight surfaces meet or exceed ASTM and have a highly polished finish.
Available in high grade stainless steels including Troemner Alloy 8 which possesses closely controlled density, extremely low magnetic properties, good stability, and resistance to corrosion.
Available with certificate options traceable to NIST including ISO/IEC 17025 Accredited Certificate or Traceable Certificate to aid in meeting SOP and regulatory requirements.
ASTM Individual Reference Calibration Weights Models
Certificate
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ASTM Class
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Weight Value
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Design
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Protective Case
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Uncertainty
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Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 mg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 mg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 mg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
40 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
40 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
40 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
60 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
60 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
60 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
70 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
70 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
70 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
80 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
80 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
80 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
100 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
150 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
150 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
150 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
160 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
160 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
160 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
200 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
300 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
400 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
400 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
400 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
500 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
600 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
600 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
600 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,000 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,000 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,000 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
1 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,500 g
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,500 g
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
1,500 g
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
2 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
3 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
4 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
5 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
8 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
8 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
8 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
10 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
16 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
16 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
16 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
20 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
24 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
24 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
24 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
25 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
30 kg
Certificate
No Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 kg
Certificate
ISO/IEC 17025 Accredited Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 kg
Certificate
Traceable Certificate
ASTM Class
Troemner UltraClass
Weight Value
50 kg
ASTM Individual Reference Calibration Weights Product Details
Applications
Use as a primary reference for calibrating other mass standards and use for traceability between national mass standards and ASTM Class 1 weights and lower. This class is appropriate for calibrating high-precision balances with a readability as low as 0.01 mg.
Construction
Weights 1 g and above are two-piece. Weights 500 mg and below are one-piece. Weights ≥2 kg are 316 Stainless Steel. Weights 1 kg to 1 g are Troemner Alloy 8. Weights 500 mg - 5 mg are 304 Stainless Steel. Weights below 5 mg are Aluminum.
Design Features
Weights 50 kg through 1 g are cylindrical with handling knob. Weights 500 mg and below are flat with one end turned up for easy handling.
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