50g Calibration Weight - Class 3 Laboratory Grade by Rice Lake

Rice Lake

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Product Overview

Rice Lake 50 gram Class 3 Calibration Weight (Part Number 13186)


Ensure the accuracy and reliability of your measurements with the Rice Lake 50gram Class 3 Calibration Weight. This essential tool, part number 13186, is designed for precision calibration in various laboratory and industrial settings. Manufactured in the USA, it represents the pinnacle of quality and precision.


  • Material: Made from high-quality stainless steel with a satin finish, ensuring durability and resistance to corrosion.
  • Condition: New, old-stock items that are clean and in excellent condition, guaranteeing reliability.
  • Protective Case: Comes with a protective storage and transport case, safeguarding the weight against physical and environmental damage.
  • Calibration Data Sheet: Includes a Standards & Calibration Data Sheet for easy reference and compliance.


Utilizing the Rice Lake 50g Class 3 Calibration Weight ensures precise calibration for Class I and II balances, among other applications. Its robust construction and comprehensive documentation make it a valuable asset for professionals seeking accuracy and consistency in their measurements.


Calibration Weight Science and Technology FAQ:

What is the purpose of calibration weights?

Calibration weights are used to verify and adjust the accuracy of weighing instruments. They provide a known mass against which scales and balances can be compared, ensuring precise measurements in scientific, industrial, and commercial applications.

How are calibration weights classified?

Why is stainless steel commonly used for calibration weights?

Stainless steel is preferred for several reasons:

  • Corrosion resistance, ensuring long-term stability
  • Non-magnetic properties, reducing interference with sensitive equipment
  • Density close to 8 g/cm³, minimizing air buoyancy effects
  • Durability and ease of cleaning

How does air buoyancy affect calibration weights?

Air buoyancy can affect the apparent mass of a calibration weight. The buoyant force of air reduces the weight's apparent mass slightly. This effect is more significant for larger weights and must be accounted for in high-precision measurements.

What is the importance of traceability in calibration weights?

Traceability ensures that a calibration weight can be linked through an unbroken chain of comparisons to national or international standards. This guarantees the weight's accuracy and allows for consistent measurements across different locations and time periods.

How often should calibration weights be recalibrated?

The recalibration frequency depends on factors such as:

  • Usage frequency
  • Environmental conditions
  • Handling practices
  • Required accuracy level

Typically, annual recalibration is recommended for most applications, but some high-precision environments may require more frequent checks.

What is the difference between calibration and verification?

How does temperature affect calibration weights?

Temperature changes can cause slight expansions or contractions in the material of calibration weights, potentially affecting their mass. For high-precision applications, weights should be allowed to acclimate to the ambient temperature before use, and temperature corrections may be necessary.

What is the significance of the ASTM E617-18 specification?

ASTM E617-18 is a standard that defines the specifications and tolerances for laboratory weights and precision mass standards. It ensures consistency and accuracy in weight manufacturing and calibration across different manufacturers and laboratories.

About Rice Lake Weighing Systems / A Legacy of Precision:

A Family-Owned American Success Story

Rice Lake Weighing Systems is an American multinational industrial scale manufacturer headquartered in Rice Lake, Wisconsin. Founded in 1946 as Thomas & Johnson Scale Service, the company has grown from humble beginnings to become a global leader in measurement and automated process control[1].

Rich History and Growth

The company's journey began when Donald B. Johnson and Warren Thomas established their scale service in an area with high demand due to local dairies, creameries, and railroads. Over the years, the company evolved, changing its name to Rice Lake Bearing Inc. in 1971 and finally to Rice Lake Weighing Systems in 1986[1].

Global Presence

Today, Rice Lake Weighing Systems has expanded far beyond its Wisconsin roots. The company has manufacturing facilities and offices across the United States, as well as international locations in:

  • Monterrey, Mexico
  • Heteren, Netherlands
  • Chennai, India
  • São Paulo, Brazil

This global network allows Rice Lake to serve customers worldwide with localized support and expertise[1].

Commitment to Quality and Innovation

Rice Lake Weighing Systems is ISO 9001:2015 certified, demonstrating its commitment to quality management and customer satisfaction. The company offers more than 40,000 products, with over one million items in stock available for same- or next-day shipping. This vast inventory, combined with their ability to design custom equipment and integrated systems, positions Rice Lake as a leader in the weighing industry[2][4].

Diverse Product Range

While known for precision calibration weights, Rice Lake's product line extends far beyond. They manufacture and distribute a wide array of weight-related products and process-control equipment, including:

  • Digital weight indicators
  • Vehicle scales
  • Dimensioning systems
  • Laboratory balances
  • Load cells and weigh modules

This diverse range serves virtually every industry, from agriculture and food processing to pharmaceuticals and transportation[4][5].

Dedication to Customer Service

Rice Lake prides itself on exceptional customer service, offering support 24 hours a day, 7 days a week, 365 days a year. This commitment to customer care has been a cornerstone of their business philosophy since the beginning, as reflected in their motto: "Take care of the customer and the rest of the business will take care of itself"[2][6].

Investment in Education and Training

The company demonstrates its commitment to the industry through various educational initiatives. Rice Lake offers technical and sales scale training courses, covering topics from sales techniques to troubleshooting the latest weighing equipment. These sessions are available in-person, on-location, and online, featuring hands-on demonstrations by industry experts[4].

By choosing a Rice Lake Weighing Systems product, customers are not just getting a high-quality measurement tool; they're benefiting from decades of experience, innovation, and a deep-rooted commitment to precision and customer satisfaction.

Item was as described, and very fast delivery!

5 stars across the board for every seller rating category, and I would buy from this seller again. And per my request, the capacitors were also very well packed for safe delivery.

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In recent times I have had a few items go astray enroute to my address in Australia. This seller was most helpful & encouraging, regarding the onward tracking & eventual safe delivery of this item. This item's arrival in good condition was a joy to me as, it was a rare part that fitted my military comms. Well done seller. I would gladly recommend this seller to all potential buyers.

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The item was as described and in good and working condition.

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Robert L.

Super Duper Fast Shipping.

Item As Described. Packaged Nicely, What A Seller.

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Product shipped quickly and arrived in good shape

J. Fong


The instrument was well packed. It is in extremely good condition. It passed all preliminary tests.

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Item looks better than described, looks brand new and works great.

My old buffer was 50 years old and I sent it to buffer heaven, thanks.

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Just what the doctor ordered.

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