Don’t Let Equipment Drift Put Your Results at Risk
Your instruments are critical to the quality of your work. However, over time, the performance of instruments such as electronic balances and micropipettes can change due to normal wear and tear.
According to HOKLAS Supplementary Criteria No. 2 ‘All Test Categories – Equipment Calibration and Verification’ Appendix A “Common Equipment”, the recommended maximum period between successive calibrations and verifications is three years for balances and scales and six months for piston-operated volumetric apparatus (e.g. micropipettes).
For equipment that is used frequently daily, a shorter calibration interval may be appropriate.
Undetected equipment deviations can affect test results, potentially leading to retesting, additional time and workload, and delays to operations. Where affected results are carried forward to subsequent processes, the impact may extend further, resulting in greater operational and business risks, as well as potential damage to professional reputation and customer confidence.
Through professional calibration services and regular equipment checks, you can identify potential deviations at an early stage, reduce measurement risks, and maintain stable, accurate and reliable quality management and day-to-day operations.
Professional Calibration Services You Can Trust
Chow Sang Sang Precious Metal Laboratory is accredited under the Hong Kong Laboratory Accreditation Scheme (HOKLAS) for Calibration Services (Registration No. HOKLAS 030).
HOKLAS is an accreditation scheme operated by Hong Kong Accreditation Service (HKAS) under the Innovation and Technology Commission (ITC). Accredited laboratories are regularly assessed by independent qualified assessors. Accredited conformity assessment bodies have the competence in providing the service listed in their scope of accreditation. They have an appropriate organisation structure, suitably and adequately staffed and equipped and operate under a documented quality management system in conformity with relevant international standards. The results they obtain are reliable and trustworthy. Non-medical laboratories accredited by HKAS are in conformity with the international standard ISO/IEC 17025 – General requirements for competence of testing and calibration laboratories.
Our calibration services are carried out by a dedicated team of competent personnel. All measurement equipment used in our calibration activities is calibrated against traceable reference standards, maintaining an unbroken chain of traceability to the International System of Units (SI). We are committed to delivering every calibration service with consistent quality and dependable turnaround times.
Services
We provide the following calibration services, all of which fall within our HOKLAS-accredited scope of calibration services.
Electronic Balances
- Issuance of HOKLAS-endorsed calibration certificates with results traceable to the International System of Units (SI)
- Calibration performed using The International Organization of Legal Metrology (OIML) Class E2 or F1 standard weights
- Calibration performed using standard weights ranging from 1 mg to 16 kg
- On-site calibration and inspection services
Single Channel and Multi Channel Micropipettes
- Issuance of HOKLAS-endorsed calibration certificates with results traceable to the International System of Units (SI)
- Calibration performed in accordance with ISO 8655-6:2022
- Calibration performed using a range of high-precision balances with resolutions from 0.01 mg down to 0.001 mg (1 µg)
- Calibration service for single-channel piston-operated micropipettes from 1 μL to 5 mL
- Calibration service for air-displacement (Type A) multi-channel piston-operated micropipettes from 1 μL to 200 μL
Regarding our laboratory’s HOKLAS Scope of Accreditation,
please refer to the latest document published on the website of the Innovation and Technology Commission (Issue Date: 7 May 2026).
https://www.itc.gov.hk/en/quality/hkas/doc/scopes/030.pdf
Beyond Calibration : Comprehensive Support for Your Equipment Management
📝 Digital Signature Protection
Electronic certificates are secured with digital signature technology to ensure authenticity and document integrity, helping you meet quality management and audit requirements.
Chow Sang Sang Precious Metal Laboratory digitally signs every certificate using recognized digital certificates (“e-Cert”) issued by Hongkong Post Certification Authority.
When you open the certificate PDF file with Adobe Acrobat Reader DC, you will see the following message:
OR
If you click the “Signature Panel” button, you will see the identity of signer is valid and verify that the document has not been modified since it was signed.
For more information about digital signatures, please refer to our FAQ – Digital Signature.
📆 Simple and Convenient Service Process
Easy application and collection arrangements
Streamline your calibration requests and equipment collection with a simple, convenient process.
Regular calibration reminders
Stay on top of equipment maintenance with timely reminders for upcoming calibration.
Express service available
Flexible express service options are available to accommodate urgent calibration needs.
Serving Diverse Industries
We provide professional calibration services to organisations across a wide range of industries. Our clients span research, manufacturing, healthcare, commercial, and industrial sectors, including but not limited to:
Contact Us
Need your equipment calibrated urgently? We offer express service options to help minimize downtime and keep your operations running smoothly. Please feel free to contact us for further details.
Whether you have questions about our calibration services or need advice on the most suitable calibration solution for your equipment, our team is ready to help.
Contact us today and let us support you in maintaining accurate, reliable and traceable measurement results.
As technologies and industry demands continue to evolve, we will continue to expand our calibration service scope and advocate the importance of calibration in ensuring quality and confidence in measurement.