Adam Equipment ASTM 0 - 20g Calibration Weight, 20g Capacity, ASTM Class 0, Stainless Steel

Adam Equipment ASTM 0 Individual Calibration Weight, 20 g Ultra-High Accuracy Stainless Steel

The Adam Equipment ASTM 0 20 g calibration weight is an ultra-high accuracy individual stainless steel weight conforming to ASTM Class 0 — the most precise classification in the ANSI/ASTM weight standard. It is designed for calibrating the most demanding analytical balances and for use as a working standard in metrology, primary calibration services, and reference-grade laboratory measurement applications where no compromise on mass accuracy is acceptable.

Key Features

• 20 g nominal value for high-precision calibration of analytical and micro-balance instruments
• ASTM Class 0 — the highest accuracy classification in the ANSI/ASTM weight standard
• 7.96 g/cm³ density per the Class 0-1 specification, reflecting the most stringent material requirements
• Polished stainless steel with the highest surface finish specification in the ASTM weight range
• Supplied in an impact-resistant plastic case to protect the weight from physical damage
• Serial number clearly recorded on case for full calibration traceability documentation

Detailed Overview

ASTM Class 0 represents the apex of the ASTM weight hierarchy. Its tolerance limits are substantially tighter than those of Class 1 and several times tighter than Classes 2-4, reflecting the manufacturing precision and material quality required to achieve this level of mass accuracy. The 20 g denomination is a practically important reference at this class level — it spans the useful calibration range of many high-resolution analytical balances and provides a defined reference point for sensitivity and linearity verification of instruments operating at 0.01 mg resolution or better.

The 7.96 g/cm³ density specification and polished surface finish at Class 0 standard represent the tightest combination of material consistency and surface quality in the ASTM range. Any surface damage, contamination, or oxidation on a Class 0 weight would more readily produce a measurable mass deviation because the tolerance budget is so small. This makes the impact-resistant plastic case an essential component of the delivery — physical protection is not optional at this accuracy level. The serial number recorded on the case enables the full traceability documentation demanded by ISO 17025 accreditation, pharmaceutical primary reference standards programmes, and national metrology institute working standards management.

Applications

• Calibration of reference-grade and analytical balances in national and accredited metrology laboratories
• ISO 17025-accredited calibration services operating at the highest ASTM accuracy tier
• Pharmaceutical primary reference standard weighing programmes requiring Class 0 mass references
• Research applications where measurement uncertainty at the calibration level must be reduced to the minimum achievable

Why Choose the Adam Equipment ASTM 0 - 20g?

When the measurement application requires the smallest achievable calibration uncertainty, ASTM Class 0 is the only appropriate standard. The Adam Equipment 20 g ASTM 0 weight delivers this level of accuracy in a carefully protected, serialised package that supports the most demanding traceability and compliance requirements in analytical and metrological practice. It is the correct specification for laboratories where calibration quality directly determines the validity of measurement results at the highest performance levels.