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
Waters Corp Needle Kit, FEP/Metal, 20μL, I-Class
This needle kit provides an optional 20μL FEP/Metal needle assembly. It is designed for use in ACQUITY I-Class Fixed Loop (FL) Sample Managers and UPLC systems.
- Optional 20μL FEP/Metal needle assembly.
- Designed for use in ACQUITY I-Class Fixed Loop (FL) Sample Managers.
- Recommended annual replacement.
Rice Lake Weighing System Weight Kit,Leaf 500mg ASTM Class 1 Polished Density 7.95
Calibration Weight, Rice Lake Weighing Systems, Leaf, 500mg, ASTM, Class 1 SST Polished Density 7.95
Alkali Scientific Drug Testing Container, Polypropylene, Attached White Screw Cap, Tamper Seal, Patient ID Label & Temperature Strip, 95 kPa rated,, 60mL, 120/Case
Urine Drug Testing Containers from Alkali Scientific are designed to support secure, compliant specimen collection and transport in clinical and occupational health environments. Manufactured from durable polypropylene, each container features an attached white screw cap with an integrated tamper evident seal to help maintain specimen integrity and support chain of custody requirements. A built in temperature strip allows immediate specimen validation at the time of collection, while the included patient ID label supports accurate identification and documentation. Each container is 95 kPa rated to provide reliable, leak resistant performance during handling and transport, including air shipment. Suitable for use in DOT and non DOT testing programs, these containers support consistent specimen collection workflows.
MSC Starrett Feeler Gage, 0.02 in Thick, 0.5 in Wide, 12 in Long, Stainless Steel
This single leaf feeler gage is designed for precise measurements. It features a thickness of 0.02 inch, a width of 0.5 inch, and a length of 12 inch, constructed from durable stainless steel.
- Single leaf design for accurate gaging.
- 0.02 inch thickness for fine measurements.
- 0.5 inch width for broad applicability.
- 12 inch length for extended reach.
- Made from stainless steel for durability and corrosion resistance.
- Parallel leaf style.
MSC 80/20 Inc. 45 Degree Support, T-Slotted, Aluminum, 320 mm
This 45 degree support bracket is made of aluminum and designed for T-slotted extrusion systems. It provides a clean, flush connection and is pre-machined with counterbores and a 45 degree miter angle on both ends. This support is ideal for reinforcing 90 degree connections and is suitable for applications with heavy loads to minimize beam deflection.
- Includes all necessary hardware for assembly
- Pre-machined with counterbores
- Features a 45 degree miter angle on both ends
- Provides a clean, flush connection
- Designed to reinforce 90 degree connections
- Minimizes beam deflection in heavy load applications
- Constructed from durable aluminum
- Finished with clear anodizing
- Overall length of 320 mm
Rice Lake Weighing System Weight,CYL 2kg ASTM Class 5 SST Satin Density 7.84
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 2kg, NIST, Class F, SST Satin, Density 7.84
Rice Lake Weighing System WEIGHT LEAF 200MG NIST CL F
Calibration Weight, Rice Lake Weighing Systems, Leaf Style, 200mg, NIST Class F, SST Satin, Density 7.95