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
Uline Cast Iron Weight With Nist Traceable Certificate - Class 6, 50 Lb
Cast Iron Weight With Nist Traceable Certificate-Class 6 50 Lb
Med Vet International Otomite Plus 0.5oz
Ear CleanserProducts are not always manufacturer specific. Actual product appearance may differ from website image.
Essendant Survivor Lightweight 14 lb Tyvek Catalog Mailers, #6 1/2, Square Flap, Redi-Strip Adhesive Closure, 6 x 9, White, 100/Box
Quality Park Survivor Catalog Mailers are made with durable 14-lb DuPont Tyvek which is strong enough to withstand the most grueling conditions The material is puncture tear and moisture resistant virtually indestructible Yet it is still lightweight which can provide a savings on shipping costs These white mailing envelopes feature an easy Flap-Stik closure which requires no moisture for a secure seal and a release strip for quick easy opening Lightweight 14 lb Tyvek Seam Type- Center Flap Type- Square Trade Size- 6 1/2 Security Tinted- No
Grainger Screw Knob Black
The Justrite Screw Knob is a black plastic knob designed for use with Justrite safety cans. It has a 1-3/4" diameter knurled grip and a 1/4"-20 threaded stud. The knob can be used as a replacement part on many Justrite safety cans, including the 2 gallon and 5 gallon rectangular safety cans. It provides a comfortable grip and secure closure for the safety can pour spout. The black color matches most Justrite safety cans. This is an OEM replacement part made by Justrite.
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 16 liter aluminum cylinder contains 99.9995% pure air 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 supplier. The 16N075 model contains 16 liters of gas at a pressure of 2000 psi.
Rice Lake Weighing System MECH SCALE LB ONLY W/ HT ROD
Medical Scale, Rice Lake Weighing Systems, RL-MPS-10 Mechanical Physician Scale 450lb x 4oz (LB only) including retractable height rod and rear wheels, 10.75in x 14.75in Platform, Easy operation w/ two sliding weights