Specialists in on-line measurement of mining process reagents
About UsDesigning on-line analysers since 1989
Process Analytical Systems (PAS) designs and manufactures on-line chemical analysers that help processing plants measure critical reagents accurately and maintain tight process control.
Built for real plant conditions
From the beginning, our purpose has been straightforward: help plants measure critical reagents accurately, run more efficiently, and meet the standards of modern mining and metallurgical operations.
Over the years we have seen how inconsistent reagent measurement affects recovery, consumption and environmental compliance. Those observations shaped the analysers we build today, designed for real plant conditions, not laboratory environments.
PAS remains privately owned and independent. Our engineering team designs, refines and supports every analyser in-house.
Metallurgical engineering & instrumentation
Our analysers are designed by a team with experience across metallurgical and chemical engineering, instrumentation, electronics and process control.
On-Line cyanide measurement
Free and WAD cyanide, across the methods that suit the circuit.
On-Line acid measurement
Acid, lime and pH measurement for hydrometallurgical circuits.
Reagent control
Using measurement data to drive consistent reagent dosing.
Integration & support
Plant integration, commissioning and long-term maintenance.
Supporting operations worldwide
PAS analysers are installed across gold, silver and base-metal operations, supporting both established plants and new EPCM-led projects. We work closely with operations, project teams and engineering consultants on each installation.
Our footprint has grown through performance and long-standing relationships with process engineers and plant metallurgists.
Installed across Africa, the Americas, Europe & CIS, and Asia-Pacific, supported remotely and on site.
A disciplined approach to design and support
We align our quality management practices with ISO 9001 principles and apply a disciplined approach to product design, assembly, testing and support. Health, safety and regulatory compliance are integral to how we operate.
Supporting the Cyanide Code
Our analysers help operations meet environmental and compliance frameworks, including the International Cyanide Management Code (ICMI). Accurate on-line measurement supports maintaining cyanide set-points and managing reagent addition responsibly.
Planning a plant, or reviewing reagent control?
Whether you are building a new facility or improving cyanide or acid control on an existing one, our team can help.
Speak to an Expert