Federal Laboratory Consortium for Technology Transfer

Scaling an Electrochemical Sensor from Lab to Industrial Gas Sites

The story begins at a national laboratory where a small team of electrochemists spent three years refining a sensor originally designed for trace hydrogen sulfide detection in confined spaces. What started as a benchtop experiment has now become a deployed industrial monitoring solution across Australian heavy industry. The journey illustrates how federally funded research, paired with the right commercialisation pathway, can move from a research curiosity to a piece of field equipment that helps operators meet regulatory thresholds and protect workers in harsh operating environments.

In Australia, where mining, LNG processing, and chemical manufacturing dominate the industrial landscape, continuous gas monitoring is far from optional. Operations from the Hunter Valley coalfields to the Pilbara iron ore precincts must track emissions, fugitive gases, and worker exposure around the clock. The Federal Laboratory Consortium for Technology Transfer acts as the connective tissue between the originating research team and the end users in the bush, linking inventors with manufacturers, investors, and industry partners who can shepherd a prototype toward volume production.

The origin: a laboratory innovation

The core technology emerged from a federally funded research program focused on improving the selectivity and lifetime of amperometric gas sensors. Conventional electrochemical cells rely on a liquid electrolyte that drifts over time, particularly when exposed to temperature swings and high humidity. The lab team replaced the liquid phase with a proton-conducting polymer membrane and added a nanostructured working electrode that increased the active surface area without enlarging the sensor footprint. Sensitivity to hydrogen sulfide climbed by a factor of four, and the cross-sensitivity to carbon monoxide dropped to negligible levels under controlled test atmospheres.

The breakthrough was not immediately marketable. The membrane chemistry required precise humidity conditioning, and the reference electrode drifted when exposed to vibration. Internal reports circulated within the laboratory network flagged the work as promising but unproven outside the bench. Standard technology transfer mechanisms would normally have sent the inventors toward academic publication, but the team recognised that Australian industry, with its concentration of sour gas handling and mineral processing operations, represented a logical first commercial home.

Identifying the industrial need

Australian regulators have tightened atmospheric monitoring obligations over the past decade, partly through the National Greenhouse and Energy Reporting framework and partly through state-level instruments such as Queensland's Environmental Protection Act and Western Australia's Department of Water and Environmental Regulation licences. Mining and gas operators in places like Karratha, Gladstone, and the Latrobe Valley must report fugitive emissions, hydrogen sulfide excursions, and oxygen deficiency incidents with increasing granularity. Compliance teams have responded by installing more point sensors, but they have also discovered that off-the-shelf devices struggle in dusty, high-temperature, and corrosive atmospheres.

Operators spoke openly about a need for sensors that could be calibrated less frequently, withstand months of unattended service, and provide reliable data feeds into existing SCADA stacks. Engineers at sites around the Bowen Basin described a recurring problem: condensation forming inside sensor housings during the cool night shift, leading to false alarms and unnecessary shutdowns. The lab sensor's membrane chemistry, with its tolerance for humidity cycling, was an unusually good match for these field realities, even though the inventors had not originally targeted the mining sector.

Navigating the federal network

The inventors used the consortium's national directory to identify potential commercial partners. The site allows users to filter laboratories by capability, region, and technology readiness level, which made it possible to compare the original lab's offerings against similar programs running in adjacent agencies. An initial match suggested a manufacturer in the consortium's regional partner network that had previously built hazardous-area instrumentation for the oil and gas sector. That contact led to a joint scoping study funded under a cooperative research and development agreement.

The scoping phase is where many laboratory discoveries stall, and the team took several steps to avoid the usual traps. They produced a market requirements document that quantified sensitivity targets, response times, and mean-time-between-failure expectations under site-specific conditions. They commissioned an independent failure modes analysis on the membrane assembly. They also invited an end-user reference group, including safety officers from a Hunter Valley coal operation and an instrument technician from a Victorian gas processing plant, to review the design intent before any manufacturing investment was made.

Engineering the scale-up

Moving from a bench cell to a manufacturable product required rethinking nearly every subsystem. The polymer membrane was originally cast in small batches inside a glove box, and the production process had to be transferred to a cleanroom environment with roll-to-roll coating capability. The reference electrode chemistry, which had performed reliably in laboratory fixtures, was reformulated to tolerate the shock and vibration of a transportable analyser mounted on a haul truck or a compressor skid. The team also drew on international production literature, including a recent overview of technology development from an overseas industry portal, which highlighted the value of pilot production runs before committing to a full manufacturing scale-up.

Calibration proved to be the most stubborn challenge. The original laboratory calibration relied on certified gas cylinders and a controlled temperature chamber. The field version had to be calibrated at the factory, hold its accuracy through shipping, and still respond linearly after months of exposure to dust, oil mist, and temperature extremes. The team worked with the manufacturing partner to embed a self-check routine that pulses a small test gas through the cell on a weekly schedule and adjusts the baseline. This feature reduced manual calibration visits, a significant benefit for remote sites in the Tanami or the New South Wales Southern Tablelands, where a service call can take most of a day.

The first commercial units shipped in a weatherproof stainless enclosure rated for hazardous areas, with a digital output that could be wired directly into a site telemetry system. By the end of the second production run, the unit cost had fallen below the original target, partly through component standardisation and partly through the elimination of a custom connector that had driven early assembly time.

Deployment across Australian industrial sites

The first commercial deployment took place at a coal handling preparation plant in the Hunter Valley, where the sensor was used to monitor hydrogen sulfide in reclaim tunnels. Plant engineers reported stable readings over a six-month period without recalibration, a marked improvement against the legacy sensors that had been failing at roughly half that interval. A second installation followed at an LNG compression station near Karratha, where the same chemistry was retuned to detect low levels of mercury vapour in the feed gas stream. The flexible platform, designed around the original membrane and electrode architecture, accepted new chemistries with relatively minor firmware changes.

In Melbourne, a research spin-off is exploring whether the membrane approach can be adapted for ammonia detection in cold storage warehouses, while a Sydney-based systems integrator has incorporated the sensor into a portable safety monitor used by utility crews working in confined spaces. The product now sits in the catalogues of three Australian distributors, and inquiries have arrived from operators in New Zealand, Indonesia, and Chile who have learned about the technology through the consortium's technology listings.

Practical guidance for teams preparing a lab sensor for market

For research teams weighing a similar scale-up path, several practical lessons emerged from this program.