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
Cusabio Technology LLC Fish Estradiol(E2) ELISA kit
This Fish Estradiol(E2) ELISA kit was designed for the quantitative measurement of Fish Estradiol(E2) protein in serum, plasma. It is a Competitive ELISA kit, its detection range is 40 pg/ml-1000 pg/ml and the sensitivity is 40 pg/ml. One kit contains 96 wells.
Perkin Elmer US LLC Test and Calibration Weights
The Test and Calibration Weights kit includes weights and testing materials required to keep the TMA 4000 properly calibrated.
World Precision Instrument Analog Microforge-MF200-M1
The MF200 Microforge is a versatile instrument designed specifically for the fabrication of glass micropipettes and other related tools. The system was developed in collaboration with Dr. Ming Li of the Department of Pharmacology, University of South Alabama. The MF200 is simple, reliable and economically priced.
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 calibration air for maintaining accuracy of gas detection equipment.
Grainger Calibration Gas 116L Ammonia Nitrogen
The Gasco Calibration Gas - Nitrogen is a high purity nitrogen gas used for calibration and purging. It has a purity of 99.998% and comes in a 116 liter cylinder with a CGA 580 outlet connection. The cylinder operating pressure is 2000 psig. This calibration gas meets National Institute of Standards and Technology standards and is ideal for calibrating gas analyzers and monitoring systems. The product number is 16N137.
Grainger Calibration Gas 116L Ammonia Nitrogen
The GASCO Calibration Gas - Nitrogen is a high purity nitrogen gas used for calibration and testing of gas detection equipment. It comes in a 103L cylinder with 99.998% nitrogen. The cylinder has a CGA 580 outlet connection and is rated for pressures up to 3000 psig. This calibration gas meets standards set by the National Institute of Standards and Technology for use in calibration and bump testing of gas monitors and sensors. The nitrogen gas is non-flammable, non-toxic and chemically inert.
Grainger Calibration Gas 116L Ethylene 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 16N087 model contains the air calibration gas in a medium size cylinder for portability.
Bio X Cell InVivoMAb anti-mouse/human CD11b (clone M1/70), 50 mg
InVivoMAb anti-mouse/human CD11b (clone M1/70) is a rat IgG2b monoclonal antibody formulated for in vivo CD11b neutralization, cell purification, and flow cytometry. Supplied in PBS (pH 7.0) with low endotoxin and no stabilizers or preservatives, the product is available in multiple sizes including a 50 mg vial.
- Clone: M1/70.
- Target antigen: CD11b (integrin alpha M).
- Host and isotype: Rat IgG2b, kappa.
- Species reactivity: Mouse and human.
- Formulation: PBS, pH 7.0.
- Endotoxin: ≤1 EU/mg.
- Preservative: none.
- Applications: in vivo neutralization, cell purification, flow cytometry.
- Available sizes: 1 mg, 5 mg, 25 mg, 50 mg, 100 mg.