Since 1838, Troemner has provided an extensive selection of calibration weights and mass standards. Today Troemner is an ISO 9001 registered company and one of the world's leading suppliers of calibration weights and mass standards. We manufacture and certify calibration weights and mass standards to meet or exceed the highest tolerance standards of the National Institute of Standards & Technology (NIST), the American Society for Testing & Materials (ASTM), the International Organization of Legal Metrology (OIML) and ISO 17025.

Since 1995, Troemner's laboratories have been accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) and the United Kingdom Accreditation Service (UKAS), formerly known as NAMAS. This dual accreditation requires Troemner to routinely undergo rigorous audits assuring our customers that their calibration weights and mass standards conform to the highest quality standards around the world.

QuickLINKS:
> Certified Weights and Weight Sets
> Free Mass Standards Handbook
> Standard Weight Product Offering

 
Certified Weights and Weight Sets

In addition to our calibration weight manufacturing capabilities, Troemner has the largest independent mass metrology laboratory in the world that offers economical, fast, and highly reliable mass calibration and certificate options. For calibration weights and mass standards, Troemner offers either NVLAP or UKAS certification for mass and NVLAP certification for density and magnetic susceptibility.

Troemner offers the most comprehensive selection offering of Calibration Masses and Mass Standards:

• Any Size – from 50 micrograms to 2000 kg (.00001oz to 5000 lbs)
   
  
• Any Denomination – metric, avoirdupois, troy ounce, grain, pennyweight, carat, other standards or even custom weights.
   
  
• Any Tolerance – including all ANSI/ASTM, NIST, OIML classes, F-Class (commercial) - or special tolerances such as Troemner UltraClass or a customer designated tolerance. Click here for more information.
   
  
• Any Material – including stainless steel, brass, aluminum, nichrome, cast iron, steel, gold, silver, titanium, and more.
   
  
• Any Shape – slotted, hook, bar, cylindrical, flat, dish, cube, etc.

 
Free Mass Standards Handbook

Troemner's proprietary Mass Standards Handbook is a useful reference for all metrology laboratory personnel. This Handbook is designed to clarify the applications, classifications and physical characteristics of calibration weights and mass standards and the tolerances used in their production and calibration. Anyone who uses balances, scales and associated calibration weights/weight sets in their work will find this publication a helpful and practical aid. Please click here to get your free booklet.

 
Standard Weight Product Offering

An overview of each calibration weight offering is listed below - if you do not see what you need or have questions - contact us!

Search for Troemner Calibration Weight by Part Number

 
Calibration Weights and Weight Sets

	Troemner Alloy 8 Stainless Steel Precision Weights, ANSI/ASTM E617 Classes 0, 1, 2, 3 and 4 and Troemner UltraClass Typically purchased as weight sets for your most precise weighing needs - manufactured from the finest Alloy 8 Stainless Steel for maximum stability available exclusively through Troemner.
	Troemner Alloy 8 Stainless Steel Precision Weights, OIML R 111 Classes E1, E2, F1, and F2 High precision calibration weights designed to conform to the standards of the Organisation Internationale de Metrologie Legale (OIML) international recommendation R 111. Manufactured from the finest Alloy 8 Stainless Steel for maximum stability, available exclusively through Troemner.
	Troemner Stainless Steel Electronic Balance Calibration Weights, ANSI/ASTM Classes 1, 2, 3, and 4 and Troemner UltraClass Typically purchased individually as needed for routine calibration of electronic balances and specific weighing applications. Designed in a cylindrical style with flat tops for stacking.
	Troemner Stainless Steel Heavy Capacity Weights Ideal for use in the food, beverage, pharmaceutical, nuclear and fine chemical industries. Manufactured from stainless steel, these weights are highly stable and resistant to corrosion - ideal for clean rooms and wash down environments.
	Troemner Stainless Steel Test Weights Primarily used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians.
	Troemner Cast Iron Grip Handle Weights Primarily used to test commercial weighing devices by state and local weights and measures officials, device installers and service technicians.
	Troemner Cast Iron Slotted Weights Weights are used in a variety of applications such as pressure, torque and tensile strength testing. Typically used with a hanger that has its weight calibrated so the hanger can be used as part of the overall weight under test.
	Troemner Stainless Steel Slotted Weights Weights are used in a variety of applications such as pressure, torque and tensile strength testing. Typically used with a hanger that has its weight calibrated so the hanger can be used as part of the overall weight under test.
	Troemner Stainless Steel Hook Weights Weights are used in a variety of applications such as pressure, torque and tensile strength testing. Weights are available with hook top, hook top and bottom, or hook top and bottom with a recessed bottom.
	Troemner Brass Weights Economical, high-quality calibration weights for general laboratory, industrial, commercial, technical and educational use.
	Troemner Special and Custom Weights Meeting your special calibration weight needs is a Troemner specialty. We can custom make precisely the weight you need for your unique applications. Please contact us with your specifications for a no obligation quotation on your special and/or custom weight needs.
	Troemner Weight Accessories Troemner offers a complete range of weight lifters, forceps, gloves and brushes for your calibration weights.

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