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
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 16 liter aluminum cylinder contains 99.9995% pure air 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 supplier. The 16N086 model contains 16 liters of gas at a pressure of 1800 psi.
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
Thomas Scientific Calibration Weight, F1 Grade, 200g
Accuris™ Instruments offers a range of precision calibration weights that are ideal for calibration of your Accuris lab balances. Each weight meets class F1 tolerance per OIML (International Organization of Legal Metrology) Recommendation R111. Made of highly polished, non-magnetic stainless steel, each calibration weight comes in a protective plastic case. The W1000 series of individual weights come in protective plastic cases with a screw top cover. The W1100-200 Weight Set includes 23 weights ranging from 1mg to 200g and is packaged in a protective carrying case with a set of tweezers, a dust brush and cleaning cloth. Special tweezers, with non-scratching plastic points are also available for proper handling; precision weights should not be touched with bare hands as oils and salts from the skin can stick to the surface of the weights. Class E2 Weight Set Premium Class E2 Weight Set is ideal for calibration of analytical balances with a 0.0001g readability. Precisio
Hach Company Weight Set, Class M-2
Standard weight set. 16-piece, with stainless steel forceps. Eight fractional weights: 10, 20, 50, 100, 200, 200, 200, and 500 mg. (Two fractional weights, 200 mg and 500mg, are stainless steel, the rest are aluminum) Eight brass gram weighs: 1, 2, 2, 5, 10, 10, 20, and 50 grams. Polypropylene case.
Rice Lake Weighing System Scale,Floor Level 150-10-7 550lb(250kg) x 0.2lb(100g) includes 6 AA Alkaline batteries
Medical Scale, Rice Lake Weighing Systems, Floor Level Physician Scale 150-107 550lb(250kg) x 0.2lb(100g) includes 6 AA batteries, LCD display, 14.5in x 14.5in x 3 in H, BMI (body mass index) function, Motion Trap
Azzota Corp Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Analytical Calibration Weights Sets, Astm Class E2, 0.001G-200G
Reprocell Stemolecule™ Y27632 2mg
Y27632 is a cell-permeable small molecule Rho-associated kinase (ROCK) inhibitor. Size 2 mg. Y27632 has been found to prevent apoptosis as well as enhance the survival and cloning efficiency of dissociated human embryonic stem (ES) cells without affecting their self-renewal properties or pluripotency. This molecule has also been shown to enhance survival during the transplantation of ES cell-derived neural precursors. Y27632 in combination with Pifithrin-u significantly improves cell recovery after cryopreservation.
Enterprise Technology Solutions Solo Cup Company Knives, Plastic, Heavyweight 1-1/10"Wx7"L, 1000/CT, White
Knives feature a heavyweight construction for sturdy performance with dense foods. Single-use cutlery is disposable for quick cleanup after use. Smooth handle helps you keep a firm grip to prevent slipping. Full-size design makes this a perfect match for high-end takeout, company events and more.
TA Instruments TGA Weight Set Calibrated, Calibrated Weight Set, Discovery TGA, Balance Mechanism, Weight Calibration, TGA Weight Set Calibrated
Waters TA Instruments TGA Weight Set (Calibrated) is a calibrated weight set used for weight calibration of the Discovery TGA balance mechanism. It ensures accurate and reproducible instrument operation.