Ross Brown Sales Pty Limited

Ross Brown Sales Pty Limited is a privately owned Australian precision measurement and calibration specialist with a trading history stretching back to 1957. Headquartered at 21 Brookhollow Avenue, Baulkham Hills NSW 2153, the company has grown into one of Australia's most recognised names in pressure and temperature metrology, providing both high-quality instrumentation and accredited calibration services to industrial, mining, energy, and manufacturing clients across Australasia. Company offices are maintained in Sydney, Melbourne, and Brisbane, with an additional office in Auckland, New Zealand, and a representative agent covering Perth — giving Ross Brown Sales a genuinely national and trans-Tasman footprint.

At the heart of the business is a NATA-accredited calibration laboratory operating under NATA Accreditation Number 1808, which has been continuously accredited since 1 February 1984 — a milestone recognised by NATA itself as an achievement of 40 or more consecutive years of unbroken accreditation. The laboratory operates to the current version of ISO/IEC 17025:2017, the internationally recognised standard for the competence of testing and calibration laboratories. This accreditation means that Ross Brown Sales can issue NATA-endorsed calibration certificates that are accepted nationally under the Mutual Recognition Arrangement (MRA) and are recognised by accreditation bodies in over 100 economies worldwide.

The laboratory's primary accreditation scope covers pressure and vacuum metrology. Calibration services are available for a comprehensive range of pressure-measuring devices, including mechanical pressure gauges, digital pressure gauges, manometers, pressure transducers (self-indicating), vacuum gauges of the bourdon-tube type, and pressure calibrators. The measurement ranges supported span from -95 kPa to 0 (vacuum) and 20 kPa to 100 MPa (positive pressure), covering the vast majority of industrial gauge and process instrumentation applications. Measurement uncertainty is defined at 0.03% of reading (or 0.1 kPa, whichever is greater) for pneumatic ranges up to 2000 kPa, and 0.03% of reading (or 0.5 kPa, whichever is greater) for hydraulic ranges up to 100 MPa.

Calibrations are performed against the test methods AS 1349 (Australian Standard for Bourdon Tube Pressure and Vacuum Gauges) and MSA Test Method 2-2008 for mechanical gauges and vacuum gauges, and MSA Test Method 1 for digital instruments and transducers. The laboratory also calibrates pressure standards — specifically non-dead-weight pressure calibrators — using comparison methods, ensuring that reference instruments used throughout industry maintain full metrological traceability. Each calibration certificate issued is NATA-endorsed and carries the formal traceability chain required for quality management and regulatory purposes.

Beyond pressure calibration, Ross Brown Sales has long been Australia's leading distributor of temperature and pressure instrumentation. Their product portfolio encompasses precision glass thermometers, thermocouples, thermistors, calibrating baths, heating blocks, data loggers, float switches, force and flow instruments, and gas flowmeters. The company is the authorised Australian distributor for major international brands including Ritter (precision drum-type gas meters and gas flow measurement equipment) and Sika (pressure and temperature measurement instruments). This dual role — calibration laboratory and specialist instrumentation distributor — means clients can both procure and have certified their critical measurement equipment through a single, trusted partner.

The client base served by Ross Brown Sales spans some of the largest industrial operations in Australasia. Confirmed clients and sectors include major energy companies such as BP and Exxon Mobil, resources and mining giants such as Rio Tinto, and industrial manufacturing and tooling companies such as Sandvik. These relationships reflect the company's capability to support demanding quality and safety environments where instrument accuracy directly impacts process integrity, regulatory compliance, and worker safety. Across these sectors, pressure and temperature accuracy is non-negotiable — underpinning everything from wellhead monitoring in oil and gas to process control in minerals processing and engineering testing in heavy manufacturing.

Ross Brown Sales employs between 21 and 50 staff, including highly trained calibration technicians and technically competent sales personnel distributed across its Australasian offices. The quality system supporting the laboratory is overseen by a dedicated Quality Manager, and the organisation has maintained ISO 9001-aligned quality management practices. The combination of ISO/IEC 17025:2017 laboratory accreditation and a quality management culture spanning more than six decades makes Ross Brown Sales a highly credible calibration partner for organisations that require defensible measurement traceability for their pressure and temperature instruments, whether for routine statutory compliance, asset management programmes, or formal quality system audits.