Weight Calibration Services
Accredited Metrology You Can Trust
Quality Control Services (QCS) operates a state-of-the-art Metrology Laboratory accredited by the American Association for Laboratory Accreditation (A2LA) under Certificate 1550.01. Our expert technicians have completed rigorous training at the National Institute of Standards and Technology (NIST), earning certifications in Basic, Intermediate, and Advanced Mass Metrology.
As an active participant in the Western Regional Measurement Assurance Program (WRAP)—a collaborative effort among metrology laboratories across eight western states—QCS engages in ongoing education and round-robin proficiency testing coordinated by the NIST Office of Weights and Measures. This ensures our procedures meet the highest standards of accuracy and reliability.
Precision Weight Calibration Services
At QCS, our weight calibration services are designed to meet the exacting needs of industries that rely on precision and compliance. All weights are calibrated against reference standards directly traceable to the International System of Units (SI) through NIST.
Our laboratory environment exceeds the stringent requirements for Echelon 1 laboratories, with a dedicated HVAC system that tightly controls both temperature and humidity. Our equipment includes Mettler and Sartorius mass comparator balances, which are integrated with advanced calibration software—such as NIST’s Mass Code Program—to ensure highly accurate, error-free results.
NIST Traceable & A2LA Accredited Certificates
QCS is accredited to calibrate weights from 1 mg to 30 kg, in both metric and imperial units (lb/oz, grain, etc.). Calibration certificates are both NIST traceable and A2LA accredited, with all measurements reported using Conventional (Apparent) Mass and Measurement Uncertainty. True Mass (Mass in Vacuum) reporting is also available upon request.
We calculate uncertainties in accordance with the Guide to the Expression of Uncertainty in Measurement (GUM) using a k factor of 2, which corresponds to approximately 95% confidence.
Weight Adjustments, Replacements & Custom Orders
Need new or replacement weights? QCS offers a variety of options, including stocked standard weights, custom weights, and complete weight sets. If a weight in your set is found to be out of tolerance, we can typically clean or adjust it in our lab to bring it back within spec. If a replacement is needed, we’ll match it to your existing set and provide expert guidance on the best course of action.
Be Prepared for Any Audit
Ensure compliance and precision with QCS’s trusted, A2LA-accredited weight calibration services. From initial setup to ongoing support, we’re here to help you meet regulatory standards with ease.