Calibration Weights
Necessary in environments that regularly use weighing devices, calibration weights guarantee that measuring standards are met. Working to correct slight mechanic changes caused by transporting or excessive instrument handling, these tools guarantee that results remain accurate. The recessed grip or hanger styles are constructed of corrosive resistant metals that withstand cleaning solvents used in uncompromised performance preparations. Calibration weights are available in various masses and tolerances to maintain any analytical balance or laboratory scale resolution and sensitivity.
Economical Class 7 Cylindrical Weights
Supplier: Troemner
For rough weighing operations in physical and chemical laboratories, such as force measuring apparatus.
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Slotted Weight Set of 13, with Hanger and Case
Supplier: United Scientific Supplies
Slotted brass weights with an included hanger.
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OIML Class E2 Precision Weight Sets, Troemner
Supplier: Troemner
Troemner OIML Calibration Weights conform to the standards of the Organisation Internationale de Metrologie Legale International Recommendation (OIML R 111)
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Eisco® Hooked Brass Weights, Set of 9
Supplier: Wards
Set of nine brass hooked weights ranging from 10 to 1000 g, perfect for classroom or lab experiments. Supplied in a wooden block for easy storage.
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Deluxe Slotted Weight Set of 8, with Rack
Supplier: United Scientific Supplies
Slotted brass weights for use with hangers.
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Eisco® 8-Piece Primary Weight Set, Brass
Supplier: Wards
Set of 9 polished and lacquered brass weights in a premium wooden storage block.
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Stainless Steel Avoirdupois Weight Sets, Class F, Troemner
Supplier: Troemner
Weight sets used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians
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Calibration Weights, Cast Iron, ASTM Class 6
Supplier: Troemner
Individual scale calibration weights adjusted to meet or exceed ASTM Class 5 to 7 tolerances. Troemner cast iron test weights offer uncertainties of less than ¹/₄ of the tolerance and are available in cube, cylindrical, flat and grip handle designs in sizes from 1 mg to 30 kg or 1 to 50 lbs.
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Slotted Masses Set of 12, Stainless Steel
Supplier: Wards
Twelve of the most widely used weights on a rack for convenient storage and transport.
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OIML Class F1 Precision Weights, Troemner
Supplier: Troemner
Troemner OIML Calibration Weights conform to the standards of the Organisation Internationale de Metrologie Legale International Recommendation (OIML R 111)
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Class 1 and UltraClass Cal-Paks with NVLAP Calibration Certificate, Troemner
Supplier: Troemner
Troemner Cal-Paks consist of high quality precision mass standards with the lowest measurement uncertainties, packaged into a versatile weight case
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OIML Class E2 Precision Weights, Troemner
Supplier: Troemner
Troemner OIML Calibration Weights conform to the standards of the Organisation Internationale de Metrologie Legale International Recommendation (OIML R 111)
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Eisco® Stainless Steel Balance Weights, Euro Design, 500 to 2000 g
Supplier: Wards
High-quality stainless steel balance weights with euro design, suitable for laboratory use.
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Hexagonal Mass Set of 5, Plated
Supplier: United Scientific Supplies
Zinc plated hexagonal masses.
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Ohaus® Replacement Hook Weights
Supplier: OHAUS CORP.
Replacement hook and weights for Ohaus® products.
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Eisco® Hooked Stainless Steel Weights, Set of 9
Supplier: Wards
Stainless steel hooked weights set with a capacity of 1000 g. Ideal for classroom or lab experiments.



