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 MECH SCALE LB & KG W/ HT ROD
Medical Scale, Rice Lake Weighing Systems, RL-MPS Mechanical Physician Scale 440lb(200kg) x 4oz (100g) including retractable height rod and rear wheels, 10.75in x 14.75in Platform, Easy operation w/ two sliding weights
Perkin Elmer US LLC Balance Tare Weight - TGA 7
This weight comes standard with the TGA 7 Sample Supplies Kit (N5190207).
Thomas Scientific Calibration Weight Set, F1 Grade, 1mg to 200g (23 pieces)
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
Grainger Calibration Gas 116L Ammonia Air
The Portagreen Calibration Gas Air 30 is a calibration gas used to calibrate and bump test gas detectors. It contains 30% oxygen balance nitrogen and comes in a 34 liter cylinder with CGA 590 outlet connection. The gas has a 2 year recommended shelf life and is available in high pressure cylinder sizes of 34L, 58L, 103L, and 116L. This calibration gas meets ISO 6141 standards and is suitable for calibrating and bump testing many brands of portable gas detectors.
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.
Grainger Calibration Gas 116L Ammonia 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. It has a working pressure of 1800 psi and comes with a CGA-590 outlet connection that is compatible with many gas detection instruments. The cylinder should be stored and used in accordance with local regulations. This calibration gas is useful for verifying calibration on gas detectors used for oxygen deficiency monitoring.
Grainger Calibration Gas 116L Carbon Dioxide Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing zero air. It has a capacity of 103L and is filled with 20.9% oxygen and 79.1% nitrogen. This high pressure cylinder has a CGA 590 outlet connection and is used for calibrating and checking the response of gas analyzers and monitoring equipment. The cylinder is manufactured by GASCO in the United States and is certified to meet NIST traceable standards. The cylinder must be secured in an upright position during storage and transport.