Services

Calibration of Weights

High-precision calibration of weights across different accuracy classes in accordance with international standards, with full metrological traceability under ISO/IEC 17025.

Calibration of Weights Accredited to ISO/IEC 17025

We provide high-precision calibration of weights across different accuracy classes, ensuring compliance with international metrological standards and quality control requirements. All procedures are performed using certified reference standards and high-sensitivity laboratory balances, ensuring full traceability of calibration results to national and international mass standards.

Measurement Ranges and Accuracy Classes

Methods and Standards

What We Calibrate

Who This Service Is For

Measurement Ranges and Accuracy Classes

Nominal mass: from 1 mg to 10 kg
Accuracy classes: F1, F2, M1, M2, M3
Typical measurement uncertainty for F1 class: 0.006–16 mg

Calibration is performed in accordance with applicable international standards, including:

OIML R 111 – requirements for standard weights
ISO/IEC 17025 – competence requirements for calibration laboratories

Compliance with these standards ensures that the calibration results are reliable and acceptable for audits and inspections.

We provide high-precision calibration of weights across a wide range of accuracy classes, ensuring compliance with international metrological standards and quality control requirements. Calibration is performed using certified reference standards and high-sensitivity laboratory balances, guaranteeing full traceability of measurement results to national and international mass standards.

High-Precision Calibration of Weights Across Different Accuracy Classes

Individual weights
Weight sets
Certified reference weights
Analytical microweights
Industrial mass standards
Laboratory calibration weight sets
On-site weight calibration

Our weight calibration services are widely used by:

Quality control laboratories
Pharmaceutical and food manufacturing companies
Chemical and oil & gas industries
Weighing equipment service centres
Corporate metrology departments

Benefits of Working With Us

High Measurement Accuracy and Repeatability

We use high-precision equipment and certified calibration methods to ensure consistent, reliable, and repeatable results for every calibration.

Compliance with International Standards

All work is performed in accordance with the requirements of ISO/IEC 17025, OIML, and other applicable international standards, ensuring that the results are accepted for audits and quality control procedures.

Fast Turnaround Times

Optimised processes and our own calibration equipment allow us to complete calibration efficiently without causing delays in your production cycle.

Calibration of Weight Sets

Accurate mass measurement is essential in industries such as pharmaceuticals, food production, manufacturing, and laboratory testing. One of the key elements in maintaining this accuracy is a weight set, which is used to verify and calibrate laboratory balances and weighing systems to ensure compliance with specified tolerances.

Over time, due to regular use, environmental conditions, and mechanical influences, the actual mass values of calibration weights may change. To maintain compliance with regulatory requirements, avoid costly measurement errors, and ensure consistent product quality, the regular calibration of weight sets is an essential procedure.

Whether you use standard weight sets for routine balance calibration or analytical weight sets for high-precision measurements, calibration by an ISO/IEC 17025 accredited laboratory guarantees accurate results and confidence in your measurement data. This approach provides the reliability and metrological traceability required for consistent day-to-day operations.

Permissible Weight Tolerances in the Metric System

The table below presents the permissible weight tolerances in the metric system.

Service Options

Calibration Process and Conditions

Certificates and Traceability

Recommended Calibration Interval

After receipt, the weights are cleaned and stabilised under controlled temperature and humidity conditions. Calibration is performed using high-precision mass comparators, minimising the influence of external factors and ensuring excellent measurement repeatability and accuracy.

Certificates and Traceability

Upon completion of the calibration, the client receives a calibration certificate issued in accordance with ISO/IEC 17025, which includes:

Actual mass value
Measurement uncertainty
Calibration methods applied
Calibration conditions
Traceability to national measurement standards

The document is available in electronic and/or printed format.

The recommended recalibration interval depends on the operating conditions and frequency of use. We provide individual recommendations to help maintain measurement accuracy and ensure compliance with your organisation’s quality management system requirements.

Frequently Asked Questions

Understanding Weight Calibration and Why It Matters

What Is Weight Calibration?

Weight calibration is the documented process of comparing your precision weights with certified mass standards whose values are known and traceable to national measurement standards. During calibration, the actual mass value and deviation of each weight are determined, and an official document is issued to confirm the accuracy of the measurement results.

In other words, even if your analytical weight is marked as “100.000 g,” without calibration there is no assurance that its actual mass value is correct.

Our ISO/IEC 17025-accredited laboratory compares your weight with reference standards traceable to national measurement standards, determines any deviation, and records the results in a calibration certificate. This creates an unbroken chain of measurement traceability required by auditors and relied upon by your quality management system.

Why Is Calibration Necessary?

Calibration confirms that the weights remain within the specified tolerances and comply with applicable regulatory and metrological requirements. This is essential for maintaining the accuracy of laboratory and production processes and for meeting the standards documented in your quality management system.

Your Requirements – Our Responsibility

You determine the applicable calibration standards, permissible tolerances, and recalibration intervals in accordance with your internal procedures and quality policy.

Our responsibility is to perform calibration in accordance with these requirements and provide a complete set of documents with traceability to national measurement standards, giving you the evidence required to demonstrate compliance.

Benefits of Professional Weight Calibration Services

Professional weight calibration ensures accurate measurements and guarantees the reliability of all processes that depend on precise weighing. Calibration performed by an accredited laboratory helps organisations comply with regulatory requirements, maintain reliable production processes, and ensure the accuracy of measurement results.

Key Benefits:

1. Guaranteed Measurement Accuracy
Calibration determines the actual mass value of each weight and verifies that it remains within the specified tolerances, directly supporting accurate weighing in laboratory and industrial applications.

2. Traceability to National and International Standards
Official calibration certificates provide documented traceability to national mass standards, a fundamental requirement for audits and quality management systems.

3. Compliance with ISO/IEC 17025 and Industry Standards
Calibration performed by an ISO/IEC 17025-accredited laboratory helps organisations meet the requirements of pharmaceutical, food, industrial, and laboratory quality standards while reducing the risk of non-compliance.

4. Reduced Operational and Financial Risk
Inaccurate weights can lead to dosing errors, product defects, or incorrect test results. Professional calibration minimises these risks and helps prevent unnecessary costs.

5. Support for Your Quality Management System
Regular calibration ensures consistent measurement performance and forms an essential part of internal quality assurance and quality control procedures.

6. Optimised Recalibration Intervals
Our laboratory specialists can recommend appropriate recalibration intervals based on your operating conditions, helping you maintain measurement accuracy while avoiding unnecessary maintenance costs.

The Hidden Risks of Ignoring Weight Calibration

At first glance, it may seem that calibration weights do not require regular verification because their mass remains unchanged. However, even minimal deviations caused by contamination, wear, mechanical damage, or environmental exposure can gradually introduce errors into measurement processes. Ignoring calibration creates several hidden risks that may quietly affect production operations and the quality of finished products.

1. Incorrect Weighing Results

Even a slight change in the mass of a calibration weight can cause systematic errors in balance performance, affecting the accuracy of dosing, formulations, and laboratory measurements.

2. Non-Compliance with Regulatory Requirements

The absence of valid calibration records may result in non-compliance with ISO/IEC 17025, GMP, or applicable industry standards, potentially leading to audit findings, penalties, or production shutdowns.

3. Increased Production Losses

Mass measurement errors can lead to defective products, repeated testing, rejected batches, or inaccurate inventory records. These are direct financial losses that could often be prevented through regular calibration.

4. Reduced Confidence in the Measurement System

Without traceability to recognised mass standards, weighing results become questionable, undermining the reliability of the entire quality control system.

5. Unexpected Equipment Failures

Inaccurate calibration weights may contribute to unnoticed overloading or incorrect operation of precision balances, accelerating equipment wear and increasing repair and maintenance costs.

Request Weight Calibration

Planning to calibrate your weights or update your mass standards? Complete the short form, and our specialists will contact you to provide expert advice, discuss the technical details, and recommend the most suitable solution.

We will professionally assess the condition of your weights, perform calibration in accordance with international standards, and issue an official calibration certificate compliant with ISO/IEC 17025, with full traceability to national mass standards.

Fast. Convenient. Professional.

Request a Service