Calibration Weights
Accurate and stable reference standards for calibrating weighing equipment, including variously certified/accredited weights and weight sets from different classes. Products may be constructed of aluminum, stainless steel, brass, iron, and other alloys.
Calibration weights (also known as reference weights or test weights) are manufactured to meet high tolerances and accuracy. They are used to spot-check the performance and verify the calibration of analytical balances, precision balances, and general-purpose scales in research laboratories, educational settings, and other working environments. Some calibration weights may also be used as reference weights for the calibration of improvised or non-certified weights.
How Are Calibration Weights Made?
Calibration weights may be take the form of simple discs, cylinders, wires, or leaves. Sold separately or as sets, they may also be supplied with tweezers, gloves, and a protective case. Calibration weights are often supplied as accessories for specific balance brands and models.
Calibration weights are made from polished brass, aluminum, special stainless steels, or other metals for durability, anti-magnetization, and resistance to corrosion or wear that may affect their accuracy.
Available in nominal values from a few milligrams to 10 kg or more, they may be supplied with certificates or statements of accuracy, compliance, and traceability.
How Are Calibration Weights Classified?
Calibration weights are classified based on accuracy by organizations such as ASTM, OIML, and NIST. The appropriate classification depends on the resolution of the balance and the degree of accuracy needed to satisfy a particular weighing application.
Principal Classes of Calibration Weights:
• Class M1: For standard scales
• Class F1: For precision electronic balances
• Class E2: For highly accurate analytical balances
Rice Lake Weighing System Weight Set,5kg-1g ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 5kg-1g, ASTM Class 5, Stainless Steel, Satin finish, 18.11kg Kit
Rice Lake Weighing System WEIGHT KIT 200G ADJUSTED
Calibration Weight Kit, Rice Lake Weighing Systems, 200g Adjusted, ASTM Class 1, SST Polished, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System WEIGHT KIT 100G ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 100g, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
Rice Lake Weighing System WEIGHT 5MG LEAF ASTM CLASS1
Calibration Weight, Rice Lake Weighing Systems, Leaf, 5mg, ASTM, Class 1 SST Polished Density 7.95
Rice Lake Weighing System Weight Set,50g-1g ASTM Class 5
Calibration Weight Kit, 50g-1g, ASTM Class 5, Stainless Steel, Satin finish, (5-2-2-1 configuration), 110g Kit
METTLER TOLEDO 3P INDUSTRIAL WGT SET 1MG-200G 23 ASTM CL4 C
NC3369324 WGT SET 1MG-200G 23 ASTM CL4 C
Azzota Corp Analytical Calibration Weights Sets, Astm Class F1, 0.001G-500G
Analytical Calibration Weights Sets, Astm Class F1, 0.001G-500G
Genscript Corporation CytoSinct M1 magnet
The CytoSinct Manual Separator system is developed to separate human and animal cells The material to be separated for example cells is first magnetically labeled with superparamagnetic CytoSinct Nanobeads After magnetic labeling cells are passed through a CytoSinct Columns which is placed in the strong permanent magnet of the CytoSinct Manual Separator The ferromagnetic spheres in the column amplify the magnetic field by 10 000-fold thus inducing a high Magnetic field gradient Unlabeled cells pass through while magnetically labeled cell are retained within the column After removal of the column from the magnetic field the retained fraction can be eluted Both fractions labeled and non-labeled can be collected for downstream applications including cell culture and flow cytometry
