Boutique gin, whisky and vodka distilleries are built around one key ingredient: high-purity ethanol. It’s also one of the biggest unseen hazards on site—because ethanol vapour can form a flammable atmosphere long before anyone smells it.
At Gas Alarm Systems, we design and supply fixed gas detection and control systems specifically to detect ethyl alcohol (EtOH) vapours and automatically alarm, shut down processes, and/or force ventilation—so your team can keep producing safely and consistently.
Why ethanol vapour is a distillery hazard (even in “small” sites)
Ethanol is a Class 3 flammable liquid, but the real operational risk is the vapour. In air, ethanol becomes ignitable above its Lower Explosive Limit (LEL) of ~3.3% v/v—meaning a leak in an enclosed or poorly ventilated space can escalate into an explosion hazard if an ignition source is present.
Two things make distilleries especially vulnerable:
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Low flash point: ethanol can generate flammable vapours at typical ambient temperatures (flash point commonly cited around 13°C for ethyl alcohol).
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Lots of “leak opportunity” points: pumps, hoses, sample points, gaskets, CIP connections, tank vents, bunds, and transfer stations.
Where ethanol risk shows up in real distilleries
In our experience, ethanol vapour issues are most likely in:
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Spirit storage rooms & bunded areas (vapour can pool and linger)
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Packaging / bottling lines (repetitive handling + small spills)
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Pump skids & transfer points (hose failures and seal leaks)
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Barrel rooms (ventilation varies; “slow” vapour build-up)
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Still rooms (process heat, ethanol handling, and ignition sources)
The right approach: detect early, alarm clearly, and control ventilation automatically
A strong ethanol safety design usually includes three layers:
1) Continuous fixed detection (measuring in %LEL)
For ethanol, we typically monitor in 0–100 %LEL so you can alarm well before concentrations approach a dangerous range.
Our fixed ethanol transmitter options include:
1) Safe Area Sensors
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μGard®2 Ethyl Alcohol Gas Transmitter (MC2 series) for continuous EtOH monitoring
2) Hazardous area (Zone) rated detection where required
If your ethanol source or ventilation design pushes parts of the facility into classified hazardous zones, use certified equipment.
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PolyXeta II PX2 Ethyl Alcohol (IECEx) detector—Zone 1 & Zone 2 capable, 4–20 mA output, catalytic (pellistor) sensing, and designed for 0–100 %LEL ethanol monitoring.
3) Controllers that can trigger alarms, fans, and BMS integration
A detector is only half the system. The controller is what turns detection into action:
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GC-06 Gas Controller for toxic/combustible/refrigerant monitoring with configurable setpoints and system self-monitoring. (for bigger systems)
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MSC2 Gas Controller with analogue inputs for transmitters—ideal when you want a straightforward controller-to-sensor architecture. (for smaller systems)
Practical alarm strategy (what we typically engineer)
Every site is different, but a common best-practice sequence looks like:
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Alarm 1 (early warning): audible/visual alarm + operator response
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Alarm 2 (high alarm): forced ventilation, interlocks, shutdown logic (as required), and escalation
The key is designing alarms around how your distillery actually operates (doors open/closed, fan capacity, spill scenarios, and process steps)—not generic numbers.
Quick checks, commissioning, and ongoing confidence
Fixed systems should be commissioned properly and then maintained—because calibration drift, sensor poisoning, airflow changes, and layout changes can all affect performance over time.
Gas Alarm Systems’ core offering includes design, engineering, implementation and calibration support across Australia.
If you’re building a new distillery, expanding production, or upgrading ventilation, we can help you choose the right ethanol detection architecture and hazardous-area approach.
Contact our team on 02 9838 7220 or email sales@gasalarm.com.au to discuss your specific application and compliance requirements.