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 200G CYLINDRICAL CL F
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 200g, NIST Class F, SST, Satin Density 7.84
Grainger Calibration Gas 116L Carbon Dioxide Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing air for calibrating gas detection instruments. This 34 liter aluminum cylinder contains 99.9995% pure air balanced with nitrogen and is certified to NIST traceable standards. The cylinder has a CGA-590 outlet with a brass valve and is refillable. This calibration gas is suitable for calibrating and bump testing gas detectors used for monitoring oxygen levels. With a 2 year shelf life, this cylinder from GASCO provides high purity air from a reliable gas supplier. The 16N074 model contains air at approximately 2000 psi fill pressure.
GA International Removable Solvent-Resistant Color Labels for Containers 2" x 1" / 50.8mm x 25.4mm Rectangle red From -80°C to +100°C (-112°F to 212°F)
Solvent and chemical-resistant removable color labels are designed for thermal-transfer barcode printers, offering an exceptional solution for color-coding bottles and similar containers that face exposure to a diverse range of common laboratory reagents and storage in deep-freeze conditions.Designed to withstand the damaging effects of alcohols, xylene, toluene, methyl ethyl ketone (MEK), acetone, thinners, commercial cleaners, window cleaners, and surface sanitizing wipes, these labels prove to be a safeguard against chemical degradation. Their resilience ensures that vital information remains clear, legible, and intact, even when subjected to the most challenging conditions.These freezer-grade labels have a glove-friendly adhesive for effortless application, facilitating easy handling while maintaining a strong and secure surface adhesion. We recommend using our XAR-class of solvent-resistant ribbons for printing to guarantee a chemical-resistant printout that retains its qualit
Grainger Calibration Gas 116L Carbon Monoxide Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing air for calibrating gas detection instruments. This 34 liter aluminum cylinder contains 99.9995% pure air balanced with nitrogen and is certified to NIST traceable standards. The cylinder has a CGA-590 outlet with a brass valve and is refillable. This calibration gas is suitable for calibrating and bump testing gas detectors used for monitoring oxygen levels. With a 2 year shelf life, this cylinder from GASCO provides high purity air from a reliable gas supplier. The 16N084 model contains air at approximately 2000 psi fill pressure.
Teledyne ISCO, Inc M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 Ml/Min. ; 500 Psi
M1 Class Single Piston Pump; Eccentric Drive; 0.0 - 40.0 mL/min. ; 500 psi; Stainless Steel Fluid Path; Automatic Piston Wash; without Pulse Dampener; Standard Seal (stainless steel energizer); Fitting package for 1/8"""" and 1/16"""" tubing
TARGETMOL CHEMICALS INC PROSTAGLANDIN E2 25MG
Also available in 1 mg 2 mg 5 mg 10 mg 50 mg 100 mg 500 mg 1000 mg 1 mL 10 mM (in DMSO) and bulk. Please contact Fisher for quotes. Prostaglandin E2 (PGE2) is a hormone-like compound involved in various physiological processes including smooth muscle contraction and relaxation modulation of blood vessel dilation and constriction regulation of blood pressure and inflammation modulation. purity: 99%
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
Enterprise Technology Solutions Dixie Foods Knives, Medium-weight Plastic, 1000/CT, Black
Plastic knives with an elegant black color are ideal for office parties, luncheons and breakroom use. Use with cold or hot foods. Utensils are made of medium-weight polystyrene for rigidity and flexibility as well as shatter-resistant and durable. Each knife measures 7". Efficient Dixie dense pack packaging helps conserve valuable storage space.
Sigma Aldrich Fine Chemicals Biosciences AccurisTM E2 Grade Calibra1EA
Premium Class E2 Weight Set is ideal for calibration of analytical balances with a 0.0001g readability. Precision manufactured from high purity 316 stainless steel these weights are corrosion resistant with magnetic susceptibility 0.005. The set includes 6 weights 100mg to 100g for checking repeatability cornerload linearity and span. The weights are supplied in a protective case with tweezers a cleaning cloth and a certificate of verification.
Enterprise Technology Solutions Karat by Lollicup Cutlery,Disposable,Knife,Medium-Weight,100/BX,10/CT,White
Genuine Joe Disposable Cutlery provides convenience for eating while on-the-go, or for dining where washing dishes is not an option. Durable utensils are designed to be sturdy, so they hold up to hefty meals. Cutlery is perfect for casual dining, food trucks, cafeterias and more.