National Weighing & Instruments Pty Ltd (trading as NWI Calibration)


Perth Laboratory (Precision Balances)

Accreditation No.


Site No.


Date of Accreditation

28 Jun 1996


19 Industrial Drive
Malaga, WA 6090


Mr Jamie Connolly P: +61 1300669162


Services available to external clients

Scope of Accreditation

Perth Laboratory (Precision Balances)

ISO/IEC 17025 (2017)


  • The uncertainty of measurement is reported as an expanded uncertainty having a level of confidence of 95% unless stated otherwise
Service Product Determinant Technique Procedure Limitations
Mass - Determination of mass and calibration of weighing devicesIncluding onsite calibrations Laboratory weighing devices; Precision laboratory balances Mass Gravimetric measurement against reference mass


Including on site calibrations
with Calibration and Measurement Capability of -
Precision laboratory balances -
10 µg up to 1 g
13 µg above 1 g to 2 g
23 µg above 2 g to 10 g
27 µg above 10 g to 20 g
1 in 10⁶ or 44 µg (whichever is greater) above 20 g to 1.9 k g
2.1 mg above 1.9 kg to 2 kg
1.1 in 10⁶ or 2.7 mg ( whichever is greater) above 2 kg to 3 kg
1.2 in 10⁶ above 3 kg to 5 kg
2.5 in 10⁶ or 24 mg (whichever is greater) above 5 kg to 40 kg
Industrial balances -
1.5 in 10⁵ or 1 mg (whichever is greater) from 1 g to 100 kg

The only data displayed is that deemed relevant and necessary for the clear description of the activities and services covered by the scope of accreditation.

Grey text appearing in a SoA is additional freetext providing further refinement or information on the data in the preceding line entry.