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OBA-305 series ASTM Class 1 100g Calibration Masses are highly-polished stainless steel, and recommended for analytical balances requiring first-order accuracy. ASTM Class 1 Calibration Masses range from 10g—4,000g.
All masses or sets are available with optional NIST Traceable or NVLAP Certificates. Traceable Certificates document traceability to NIST and compliance with ASTM or OIML specifications. Add “T” to model number to specify a Traceable Certificate.
NVLAP Weight Calibration Certificates provide certification to ISO, FDA, ANSI or other requirements. Report format and contents comply with NVLAP requirements. Add "W" to model number for NVLAP Certificate.
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