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
Calibration Weight Kit, Rice Lake Weighing Systems, 500g-1mg, ASTM Class 1 SST Polished (5321)
Calibration Weight Kit, Rice Lake Weighing Systems, 5lb- 1/32 oz, NIST, Class F, SST Satin, 31lb Kit
Perkin Elmer US LLC Balance Tare Weight - TGA 7
This weight comes standard with the TGA 7 Sample Supplies Kit (N5190207).
Rice Lake Weighing System WEIGHT KIT 5KG ASTM CLASS 4
Calibration Weight Kit, Rice Lake Weighing Systems, 5kg, ASTM Class 4, SST Satin, Density 7.84, Electronic Balance Calibration Weights
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.
Teledyne ISCO, Inc M1 Class Single Piston Pump; Eccentric Drive; 0.00 - 10.00 Ml/Min.; 2,000 Psi
M1 Class Single Piston Pump; Eccentric Drive; 0.00 - 10.00 mL/min.; 2,000 psi; PEEK Fluid Path; Automatic Piston Wash; without Pulse Dampener; Standard Seal (Flouropolymer energizer); Fitting package for 1/8"""" and 1/16"""" tubing
Grainger Calibration Gas 116L Hexane Air
The GASCO Calibration Gas - Air is a calibration gas cylinder containing 20.9% oxygen gas balanced with nitrogen. It comes in a 103 liter aluminum cylinder with a CGA 590 outlet connection. The cylinder operating pressure is 1800 psi. This calibration gas is used for checking, calibrating, and bump testing gas detection instruments to ensure they are functioning properly and accurately detecting oxygen levels. The cylinder is refillable and is built to DOT 3AA 2015 specifications. The product has a 12 month shelf life and is manufactured in the USA. This calibration gas is suitable for calibrating and bump testing a wide variety of gas detection and monitoring equipment.
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
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
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.
Grainger Calibration Gas 116L Hexane Air
The Gasco Calibration Gas Nitrogen is a high purity nitrogen gas used for calibration and testing of gas detection equipment. It comes in a 34L aluminum cylinder with CGA 580 outlet connection. The gas purity is 99.998% nitrogen. The cylinder operating pressure is 1800 psig at 70°F. This calibration gas meets NIST traceability standards and is ISO/IEC 17025 accredited. The 34L cylinder contains approximately 3400 liters of gas at atmospheric pressure. This is an ideal nitrogen gas source for span gas calibration of gas analyzers and detectors.
Rice Lake Weighing System Weight Set,4oz-1/32oz ASTM Class 5
Calibration Weight Kit, Rice Lake Weighing Systems, 4oz- 1/32 oz, ASTM Class 5, Stainless Steel, Satin finish, 8oz Kit