Individual weights available in Troemner UltraClass (equals or exceeds OIML Class E2 tolerances), and ANSI/ASTM Classes 1 and 4.
Fractional weights 500mg to 5mg are made of stainless steel (30mg weights are aluminum); fractional weights 3mg and below are made of aluminum.
UltraClass weights 1g to 20kg are made from Troemner Alloy 8, which is a specially austenitic stainless steel that possesses closely controlled density, extremely low magnetic permeability, good stability and resistance to corrosion and handling damage. This exclusive material has a density of 8.0 at 25ºC (controlled to ±0.1%), is essentially non-magnetic in the annealed condition, and will not transform to magnetic under any combination of temperature and cold work down to –195.5ºC (–320ºF). Class 1 and 4 weights 1g to 1kg are made from Troemner Blended Stainless Steel. Weights 2kg to 50kg are made from Type 316 stainless steel.
Certifications: Where applicable, weights are supplied with a NIST/NVLAP Weight Calibration Certificate or a Traceable Certificate.
Ordering information: For ANSI/ASTM Class 2 and Class 3 analytical weights, contact your Avantor sales representative.
Delivery information: Weights 12765-632 (30390176) and 12765-640 (30390172) are supplied without certification.