Analytical & Precision Balance Company has been doing on site calibrations of our customer's weighing instruments for over 40 years. For the past 15 years, we have been ISO 17025:2005 accredited through International Accreditation Service. We understand the critical nature of our client's samples. Our Scope of Accreditation with IAS allows us to calibrate instruments from ultra micro balances all the way up to 10,000 lb platform scales. We contact customers when their equipment is due for calibration. Our customers receive the original copy of our Certificate of Calibration from the scale technician at the time the calibrations are completed. On the Certificate of Calibration, we let our customer know if the instrument was within tolerance before service. We also take four different readings on each certificate prior to service and after service. Measurements for linearity, reproduceability and eccentricity are also included on the Certificate. The calibration records are stored electronically and in hard copy for a minimum of 7 years. They are available to our customers via email.

In addition to our ISO 17025 accredited Certificate of Calibration, we also offer Combined Uncertainty Reports that are accredited with IAS. The Combined Type A and B Uncertainty Report which includes the adjustment of air buoyancy for the standards used in the calibration process, local acceleration of gravity correction, with estimated standard deviation on repeatability measurements, hysteresis, and worst case eccentricity are provided on a separate report per client's request. The methods used for determining uncertainties in the Combined Uncertainty Report are either the root sum square statistical method, total collected added uncertainty, or an expanded uncertainty with a coverage factor k = 2. Provided level of confidence: 95%. All measurements are performed with a minimum 4:1 test uncertainty ratio unless otherwise noted in the comments section. Measurements reported are traceable to SI units via standards traceable to NIST. For more information, click here.

We understand that the majority of our clients are under various regulatory agencies such as the FDA, ISO, etc. As part of our support to our customers, we are available to walk the auditors through and answer any questions with regards to the calibration procedure and information included on our certificates of calibration.

Our Class 1 weights and calibration procedures are National Institute of Standards and Technology (N.I.S.T.) traceable. The Metrology Laboratory of the State of Arizona and the Metrology Laboratory of Rice Lake Weighing Systems certifies our weights annually. Additionally, our company is an ANS/ISO/IEC Standard 17025:2005 Accredited calibration laboratory. Our ISO Registrar is the International Accreditation Service (IAS). IAS is one of only five accreditation bodies recognized by ILAC with mutual recognition arrangements with every major accrediting body. Please click to read our company's quality policy.

Customer satisfaction is of primary importance to us. If you are in need of new equipment, our staff can assist you in choosing the right balance or scale to fit your specifications.

We look forward to meeting you and having the opportunity to serve your weighing needs. You can contact us by calling 1-800-934-4451 or e-mail us at