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,CYL 2kg ASTM Class 5 SST Satin Density 7.84
Calibration Weight, Rice Lake Weighing Systems, Cylindrical, 2kg, NIST, Class F, SST Satin, Density 7.84
Rice Lake Weighing System WEIGHT SCREW KNOB 50G ASTM
Calibration Weight, Rice Lake Weighing Systems, Screw Knob, 50g, ASTM, Class 1, SST, Polished Density 7.95
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.
Features precision ground, optical grade glass and largest lens in the industry. Low voltage (15-24 v) power suplies are auto-switchable with worldwide approvals. Energy Star compliant (each unit uses 8 watts maximum). Auto shut off at 4 hour intervals to prevent energy waste while users are away. High quality die cast aluminum shades and all steel arm components for ESD safety. Virtually "maintenance zero".
Type: Weighted Base
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 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 and calibrating gas detection systems.
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
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