Units functioning under Chemical Metrology Division. 
01. Proficiency Testing Unit
02. Testing, Verification and Calibration Unit
03. Knowledge Transferring Unit
04. Certified Reference Material Production Unit
More details;
01. Proficiency Testing Unit
What is proficiency testing?
According to ISO 17043: 2023, proficiency testing is the evaluation of laboratories performance against pre-established criteria by means of interlaboratory comparisons. Proficiency testing now has become an essential part of laboratory quality procedure and it can be used as a tool to ensure a laboratories’ ability to perform to the level of competence and quality required. The importance of proficiency testing is recognized in ISO/IEC 17025 General Requirements for the Competence of Testing and Calibration Laboratories which lists participation in proficiency testing programs as an important component of the quality assurance of test results. Moreover, proficiency testing is crucial for the functioning of testing and calibration laboratories as it provides a reliable certification for the customers who use the services provided by calibration laboratories.
National Metrology Lab of Measurement Units, Standards and Services Department as the governing body of Sri Lanka in physical and chemical metrology, which provides calibration services in both areas has realized the importance of providing proficiency testing in physical and chemical metrology. Accordingly, Chemical Metrology Division of the National Measurement Laboratory has established an accredited Proficiency Testing Unit and is now functioning as an accredited Proficiency Testing provider in Sri Lanka.
(Link to the accreditation certificate)
Why choose our PT programs?
- Trusted PT provider since (Established year)
- An accredited PT provider (Certificate number and the date)
- Maintenance of the confidentiality of participants
- Rigorous statistical analysis of results
- Detailed confidential reports
- Fast publication of results
- Easy and secure results reporting through the website
Programs conducted so far
- Inter-laboratory comparison of Vernier Caliper and Dial Caliper
Proficiency Testing Unit (PTU)- Chemical Metrology Division (CMD)- Measurement Units, Standards and Services Department (MUSSD), Sri Lanka carried out this Inter-Laboratory exercise to calibrate a Vernier caliper, and a Dial Caliper in July and August 2024. A total of 07 participants took part in the ILC.
- Determination of pH of buffer solution (Accredited on )
Proficiency Testing Unit (PTU)- Chemical Metrology Division (CMD)- Measurement Units, Standards and Services Department (MUSSD), Sri Lanka carried out the proficiency test for pH in buffer solution in November 2020. A total of 14 participants took part in the PT.
Future Work
- Inter-laboratory comparison of Steel Ruler
Proficiency Testing Unit (PTU)- Chemical Metrology Division (CMD)- Measurement Units, Standards and Services Department (MUSSD), Sri Lanka is planning to carry out this Inter-Laboratory exercise to calibrate a Steel Ruler.