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
Enterprise Technology Solutions 100 Cotton Premium Weight Line
100 Cotton Premium Weight Linen Resume Paper 32 lb Bond Weight 8.5 x 11 Almond 100/Pack
Grainger Calibration Gas 116L Hexane Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing air for calibrating gas detection instruments. It has a capacity of 103L and contains 20.9% oxygen with the balance being nitrogen. The cylinder has a CGA-590 outlet connection and comes in an aluminum cylinder. The product has a 2 year recommended shelf life and is manufactured in the USA. It can be used for calibrating and bump testing gas detectors to ensure proper operation and measurement. The cylinder is DOT approved for shipment.
Grainger Lockwire Spool 0.0201 Dia 207.75ft
The Malin Company Lockwire is a 0.032 inch diameter stainless steel lockwire used to prevent loosening of threaded fasteners. It comes in a 225 foot roll and features a tensile strength of 300,000 psi. The lockwire creates a lock effect when installed in a crisscross pattern to secure bolts, nuts, turnbuckles and other threaded assemblies. It conforms to MIL-W-83420 and MS20995 standards. The lockwire is made in the USA.
Rice Lake Weighing System Weight Set,4oz-1/32oz ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 4oz- 1/32 oz, ASTM Class 5, Stainless Steel, Satin finish, 8oz Kit
Beckman Coulter CD158e1/e2-PE antibody, Clone Z27.3.7, 1 mL (IM3292)
CD158e1/e2-PE is a PE-conjugated monoclonal antibody (clone Z27.3.7) for detection of CD158e1 and CD158e2 (KIR3DL1/KIR3DS1) on human natural killer (NK) cells and subsets of CD8+ T cells by flow cytometry. Supplied in liquid format as an analyte specific reagent, 1 mL.
- Target species: Human.
- Specificity: CD158e1 and CD158e2.
- Clone: Z27.3.7.
- Fluorochrome: PE (phycoerythrin).
- Isotype: IgG1, mouse.
- Format: Liquid, 1 mL.
- Regulatory status: ASR (analyte specific reagent).
- Recommended use: Flow cytometry.
BYK Gardner CUP DENSITY 100 CC TEST CER
Astm Density Cups, Iso Density Cups,; Pyncometers,weight Per Gallon, 100mL. 52x62mm
Rice Lake Weighing System Weight Set,5kg-1mg ASTM Class 5
calibration Weight Kit, Rice Lake Weighing Systems, 5kg-1mg, ASTM Class 5, Stainless Steel, Satin finish, (5-2-2-1 configuration), 11.11111kg Kit
Grainger RICE LAKE WEIGHING SYSTEMS, Calibration Weight, 10 lb Nominal
The Rice Lake Weighing Systems 10 lb Calibration Weight is a high-precision weight used for calibrating and checking scales for accuracy. It features a stainless steel construction with a knob handle on top for easy handling. The weight has an accuracy tolerance of +/- 5 grams to ensure reliable calibration. With NIST traceable calibration certificate, this 10 lb weight is ideal for use in industrial, laboratory, and other precision weighing applications. The durable build makes it suitable for daily use.
Rice Lake Weighing System Weight Set,100g-1g ASTM Class 1
Calibration Weight Kit, Rice Lake Weighing Systems, 100g-1g ASTM Class 1, Stainless Steel, Polished finish (5-2-2-1 configuration)