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
Electron Microscopy Sciences Green-Lite™ Light with Rectangular LED 7"x5 ¼", 2x, Weighted Base
Equipped with next generation, surface mount LEDs, these innovative illuminated magnifiers will quickly pays for themseves through energy savings.
Made in the USA they feature the highest lumen output in a lighted magnifier and reduced glare, heat, and energy consumption. User controlled LED groups shine desired level of light exactly where required, and superb dimming software via convenient, reliable membrane switch.
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Type: Weighted Base
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.
BYK Gardner CUP DENSITY 100 CC TEST CER
Astm Density Cups, Iso Density Cups,; Pyncometers,weight Per Gallon, 100mL. 52x62mm
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.
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.
TA Instruments 100 Mg Class 1 Precision Weight, Weight Calibration, TGA Instruments, 100 Mg Class 1 Precision Weight
Waters TA Instruments 100 mg Class 1 Precision Weight is used for weight calibration of TGA instruments. It ensures the accuracy of sample mass measurements for precise thermogravimetric analysis results.
TA Instruments 1 Gram Class E2 Precision Weight, Weight Calibration, TGA Instruments, 1 Gram Class E2 Precision Weight
Waters TA Instruments 1 gram Class E2 Precision Weight is used for weight calibration of TGA instruments. It allows users to maintain accurate weight measurements for reliable analytical results.
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.
Uline Stainless Steel Weight With Nist Traceable Certificate - Class 5, 5 Lb
Stainless Steel Weight With Nist Traceable Certificate-Class 5 5 Lb
Rice Lake Weighing System Weight, 20kg ASTM Class 6
Calibration Weight, Rice Lake Weighing Systems, 20kg, Grip Handle, ASTM Class 6 Cast Iron, Painted