Calibration Weights

Calibration weights are precision mass standards used to verify and calibrate laboratory balances to maintain measurement accuracy and traceability. Our range includes OIML F1, E2, and M1 class stainless steel weight sets in various mass ranges.

Regular calibration of laboratory balances is required for ISO 17025 accreditation and SANAS compliance. Using certified OIML calibration weights ensures that your balance readings are traceable to national measurement standards.

SmartLabs stocks Adam Equipment OIML calibration weight sets for labs and schools across South Africa. Browse our range for compliant, accurate mass standards for your balance calibration needs.

A cylindrical calibration weight and forceps beside a balance

What is a calibration weight?

Calibration weights are precision reference masses used to check and adjust the accuracy of a balance or scale. Each weight is manufactured and classed to an OIML accuracy standard, from the coarser M1 class through to the finer E2 class used with analytical balances.

SmartLabs stocks OIML calibration weight sets across the common accuracy classes and capacities, so you can match a set to the balance you need to verify.

Common uses of calibration weights in the lab

Where calibration weights do the heavy lifting.

  • A gloved hand placing a calibration weight on an analytical balance

    Routine Balance Checks

    A quick weekly or monthly check against a known weight confirms a balance is still reading accurately.

  • A calibration weight set in a case beside a certificate and two balances

    Calibration Certification

    Traceable weight sets support formal calibration records needed for audits or accreditation.

  • A technician calibrating a balance with a weight set open beside it

    New Balance Setup

    Every new balance should be verified against a certified weight before it is trusted for daily use.

  • Gloved hands using tweezers to place a weight on a balance pan

    Troubleshooting Drift

    If a balance seems inaccurate, a calibration weight is the fastest way to confirm or rule out the balance itself.