Calibration Weights
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
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Filtered Search Results
Mettler Toledo™ Analytical Individual Weights: ASTM™ Class 1
Low magnetic permeability and high corrosion resistance for reliable stable values
Classification | ASTM Class 1 |
---|---|
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Density | 7.9kg/dm3 at 20°C |
Includes | Plastic box |
---|---|
Shape | Square |
Product Type | Adjustable Cavity Sheet Weight |
Classification | OIML Class F1 |
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Certifications/Compliance | With certificate, ISO17025:2005, ISO9001, ISO14001 environmental standard |
Density | 7.9kg/dm3 at 20°C |
Mettler Toledo™ Analytical Weight Sets: ASTM™ Class 1
ASTM precision weights, Best Price-Performance Ratio. Low magnetic permeability and high corrosion resistance ensure reliable values. All weights are made with stainless steel.
Product Type | Analytical Weight |
---|---|
Classification | ASTM Class 1 |
Material | Stainless Steel |
Density | 7.9kg/dm3 at 20°C |
Mettler Toledo™ F2AC Basic Weight Sets with Certificate
Made of vacuum melted steel for highest material purity
Product Type | Adjustable Cavity Weight |
---|---|
Classification | OIML Class F2 |
Material | Stainless Steel |
Certifications/Compliance | With certificate, ISO17025:2005, ISO9001, ISO14001 environmental standard |
Density | 7.9kg/dm3 at 20°C |
Sartorius Individual Precise Calibration Weight
ASTM Class 1 Individual Precise Calibration Weight without Certificate.
Product Type | Calibration Mass |
---|---|
Classification | ASTM Class 1 |
Material | Stainless Steel |
Mettler Toledo™ M1 OIML Class Standard Weight Set (M1 PL E)
M1 OIML class weight set includes accessories for handling and cleaning, and is housed in a plastic box.
Product Type | Test Weight |
---|---|
Material | Stainless Steel |
Case Material | Plastic |
Density | 7950 (± 140) kg/m3 |
Mettler Toledo™ F1AC Basic Sheet Weights
Allows for optimized manufacturing and adjustment processes
Includes | Plastic box; Without certificate |
---|---|
Shape | Square |
Product Type | Adjustable Cavity Sheet Weight |
Classification | OIML Class F1 |
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Certifications/Compliance | ISO17025:2005, ISO9001, ISO14001 environmental standard |
Density | 7.9kg/dm3 at 20°C |
Includes | Plastic box |
---|---|
Shape | Cylindrical |
Product Type | Adjustable Cavity Weight with Knob |
Classification | OIML Class F1 |
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Certifications/Compliance | ISO17025:2005, ISO9001, ISO14001 environmental standard |
Density | 7.9kg/dm3 at 20°C |
Product Type | Calibration Weight |
---|---|
Classification | ASTM Class 1 |
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Troemner™ Metric Economical Stainless Steel Calibration Weight Sets, Class 7
Economical, quality weights
Product Type | Metric Economical Weight Set |
---|---|
Classification | ASTM Class 7 |
Packaging Quantity | Multiple |
Material | Stainless Steel |
Density | 7.85g/cm3 at 20°C |
Troemner™ Analytical Precision UltraClass Weight Set, Traceable Certificate
Combine high precision with the advantage of two-piece construction with the most precise two-piece weights available with weight tolerances that equal ANSI/ASTM E617 Class 0 or OIML R 111 Class E2 tolerances.
Length (Metric) | 20.32 cm |
---|---|
For Use With (Equipment) | Calibration of high-precision analytical balances with readability as low as 0.01 mg |
Height (Metric) Case | 8.89 cm |
Classification | UltraClass |
Certifications/Compliance | Traceable Certificate |
For Use With (Application) | Reference standard calibration |
Case Material | Polycarbonate |
Mettler Toledo™ E2 OIML Class Standard Weight Set (E2 AL)
E2 OIML class weight set is housed in an aluminum box and includes accessories for handling and cleaning.
Includes | Plastic box |
---|---|
Shape | Cylindrical |
Product Type | Adjustable Cavity Weight with Knob |
Classification | OIML Class F1 |
Packaging Quantity | 1 |
Quantity | Each |
Material | Stainless Steel |
Certifications/Compliance | With certificate, ISO17025:2005, ISO9001, ISO14001 environmental standard |
Density | 7.9kg/dm3 at 20°C |