Questions, answered

Quick answers about Stilligent. New to distilling? Begin with the Introduction, or look up a term in the glossary.

About Stilligent5

Is Stilligent available to buy?

Not yet. Stilligent has been in development for several years and is test-run weekly on our own stills, but it is not yet available to the public. The plan is a turnkey unit: purpose-built control hardware with connectors for your sensors, fans and heating element, with the Stilligent software preloaded.

If you would like to follow our progress or become involved early, get in touch.

Can I try it before it is released?

Yes. The demo is the real Stilligent interface running in simulation mode, directly in your browser - no hardware required. Time runs at anything from 1× to 50×, so a complete spirit run can take just a few minutes. Change the settings, pause and resume freely; nothing you do there can cause any harm.

Who is Stilligent for?

Small commercial operations, craft distillers and home distillers. Automated process control of this kind has traditionally been the preserve of large distilleries - building it from scratch would demand specialist hardware, software and years of refinement. Stilligent puts that capability within easy reach.

It is also designed for still manufacturers who wish to offer intelligent control as part of their own products.

Do I need programming or process-control experience?

No. Setting up a run takes a few plain values - wash volume, starting ABV, run type and still type - and everything else has sensible defaults. The interface is designed to be read at a glance from across the room.

Can I build Stilligent into a still I make or sell?

Yes - Stilligent is designed with still manufacturers in mind. If you would like to offer automated control as part of your product, contact us to discuss integration.

Hardware & setup5

What hardware does it need?

Stilligent currently works with the Teracom TCW280 and TCW241 controllers, a column-head temperature sensor, a boiler temperature sensor, and a heating element driven by a heating power regulator. The Smart Watchdog - an independent hardware device that monitors power and can shut down the boiler even if the controller itself is unavailable - provides a second means of switching off.

Larger stills can use up to four heating elements, each with its own Smart Watchdog. Each element is controlled smoothly by a heating power regulator or simply switched on and off by its Smart Watchdog; you set one power in kilowatts, and Stilligent shares it between them.

Stilligent switches cooling fans as needed and switches the condenser's cooling on and off, and an alarm relay can drive a siren or connect to an existing alarm panel. An atmospheric pressure sensor is optional: without one, local pressure can come from an online weather service, a phone's sensors, or manual entry.

Can I add it to the still I already own?

In most cases, yes. Your still needs thermowells for the column-head and boiler temperature sensors. Many stills already have them, and they are generally straightforward to retrofit where they do not.

Which stills and runs does it support?

Pot stills and reflux columns, for both stripping runs and spirit runs.

What do I run the interface on?

Any device with a modern web browser - an Android phone, an iPhone, a tablet or a PC. The interface runs in the browser, so there is nothing to install.

What if my setup isn't supported?

The core system covers most pot-still and reflux setups. Where yours falls outside that, the software can be customised and extended - additional sensors, other hardware, or integration with equipment you already run. Describe your setup on the forum, and we'll tell you what it would need.

Running a batch8

How does Stilligent decide when to make each cut?

Each recipe has its own cut points. Once Stilligent knows yours, it adjusts them for the day's atmospheric pressure and the strength of your wash, then calls each transition - foreshots, heads, hearts and tails - as it happens.

You remain in charge. One tap makes a cut whenever your nose and palate say so, and if a suggested cut comes too early, Not yet keeps collecting. Every cut you make is recorded, and after each run the recipe moves gently towards your choices - learning can be switched off, and any change undone. For how distillers judge cuts by hand, see making the cuts.

Can I keep different recipes for different spirits?

Yes. Stilligent keeps a separate recipe for each spirit you make, each with its own cut points and, if you like, its own heat settings. It comes with starter recipes for whisky, brandy, rum, neutral spirit (pot or reflux) and flavoured spirits. Add your own, copy one as a starting point, or import and export them. When you start a run, you choose the recipe and Stilligent runs the whole distillation to it.

Rate each run, add tasting notes and mark the jars you actually blended, and the recipe learns from that too.

Why does air pressure matter?

Boiling points fall as air pressure falls, and pressure falls with altitude and shifts with the weather. At sea level ethanol boils at about 78 °C; at around 2,240 m, where air pressure is about 770 hPa, closer to 72 °C. A cut point taken from a book can therefore be several degrees out, so Stilligent corrects for the pressure wherever, and whenever, you distil - measured by its own pressure sensor, or taken from an online weather service, a reading entered by hand or simply your altitude. Distilling at altitude has a calculator for your location.

What happens at the end of a run?

Stilligent raises the power to bring the tails through quickly, then switches the heater off at the finish point. If you would rather keep collecting tails for a later run, it asks first and leaves the decision to you.

Can I leave the still and watch from my phone?

No - a still should never be left unattended. Remote access offers flexibility while you are present: keeping an eye on the run from elsewhere in the room, rather than standing over the boiler for hours.

What's the difference between an alert and an alarm?

Stilligent tells routine moments apart from problems, and responds to each appropriately.

Alerts mean you are needed for something routine - a bottle swap, or a finished run. They sound a gentle chime on your phone or PC, and never trigger the siren.

Alarms mean something has gone wrong, and are graded by severity. A non-critical alarm warns you of a problem that needs your attention. A critical alarm cuts power to the boiler - and Stilligent can be configured to call for help, by sounding a siren at the still or triggering an existing burglar or fire alarm panel. More on alerts and alarms.

Does it measure the element's power?

Yes. An element seldom draws exactly its rated power: the power it draws depends on the mains voltage, which varies from place to place and through the day. A 3 kW element on a low supply may deliver noticeably less.

So rather than assume, Stilligent measures. The Smart Watchdog reports the actual power, mains voltage and energy used per run, the element's true output is measured at the start of each run, and Stilligent bases its heat control on those measurements.

You set the power in kilowatts, with FULL for heating up. When the mains voltage drops or rises, Stilligent adjusts the element so the still receives the same heat, which keeps runs repeatable from one day to the next - and if the element can't reach the power you set, it tells you. More in our guide, your element isn't the power on the label.

Can I keep a record of my runs?

Yes. Stilligent keeps temperature charts, power readings and a timestamped event log of the run, its alarms and acknowledgements, and can export the full run as a CSV file.

Safety2

Is Stilligent a safety device?

No. Stilligent is a monitoring and control aid. It adds a layer of protection alongside - never instead of - independent hardware safeguards, sound still design and a competent operator present for the whole run.

What does it do if something goes wrong?

It cuts the supply to the element and sounds the alarm, and it will not start or resume heating until the fault is cleared. Safety in detail explains the layers behind this - and their limits.

It pays particular attention to the column-head sensor, the most important reading in a run: if it is unplugged, stops reading or drops suddenly - for example because it has slipped out of the column - Stilligent stops heating and sounds the alarm. On a still with several elements, one that fails or stops heating is switched off, you are told which, and the run carries on with the others.

Brief glitches, such as a momentary loss of Wi-Fi, are handled gracefully: Stilligent allows a short recovery period before raising an alarm, so a passing hiccup doesn't interrupt your run.

Safety in detail

Safety rests first on sound still design, independent hardware safeguards and an attentive operator. Stilligent adds a further layer on top.

Layered shutdown

Stilligent is designed so that no single failure leaves the element heating. It has two independent ways to switch the element off: the heating power regulator, which sets the element's power during a run, and the Smart Watchdog, an independent hardware device that monitors power and can shut down the boiler even if the controller itself is unavailable. The two work together: whenever heating power is at zero - paused, during a bottle swap, stopped, finished or idle - the Smart Watchdog is off as well.

On top of this, three watchdog timers keep each part of the system honest. Each one expects a regular sign of life from the part above it; if that sign stops, it switches the heating off.

  1. Your screen the controller

    Is someone watching?

    During a run, Stilligent expects at least one phone or computer to have it open. If none has been connected for 20 seconds, it assumes no one is watching: the run pauses and the heating switches off.

  2. The controller the hardware service

    Is the controller still running?

    The controller - the software that runs the distillation - checks in continually with the hardware service that drives the heating. If it falls silent for 10 seconds, because it has crashed or frozen, the hardware service sets heating power to zero and switches the Smart Watchdog off.

  3. Inside the Smart Watchdog

    The last line of defence

    The Smart Watchdog keeps its own countdown - two minutes by default - which the system must keep resetting while heating is allowed. If the resets stop for any reason, even if everything else has failed, the countdown runs out and the Smart Watchdog shuts down the boiler on its own.

Checks before and during every run
  • No heating while something is wrong. Start and Play are refused, and the Smart Watchdog stays off, while a required device has failed, the heater command fails, or the heating power regulator may be stuck on. A fault mid-run cuts the supply at once and pauses the run.
  • Brief glitches, handled gracefully. A momentary problem - such as a short loss of Wi-Fi - is given a recovery period before an alarm is raised, so passing hiccups don't interrupt a run.
  • The column-head sensor, watched closely. It is the most important reading in a run. If it is unplugged, stops reading or drops suddenly - as it would if it slipped out of the column - heating stops and the alarm sounds.
  • Plausibility and behaviour. Sensors that are disconnected, stale, stuck or out of range are detected, and the response of boiler and column to heat is compared with what is normal for your still.
  • Element not heating. If the heater is on but almost no power reaches the element - unplugged, burnt out, a failed regulator or a tripped cut-out - the run pauses and the likely causes are explained. With several elements, only the failed one is switched off: you are told which, and the run carries on with the others.
  • Regulator stuck on. If the element draws power while heating should be off, the Smart Watchdog cuts the supply immediately.
  • Safe after a power cut. The Smart Watchdog stays off when power returns, and a restarted controller always comes back with the heater off and the run paused. It is given time to reconnect once the Wi-Fi is back, rather than raising a false alarm.
  • Limits stay limits. Safety conditions take precedence over process optimisation, and learning is never used to relax a configured limit.
Alerts and alarms
  • Alerts for routine moments. When you are needed for something routine - a bottle swap, or a finished run - a gentle doorbell chime sounds on your phone or PC. Alerts never trigger the siren.
  • Alarms, graded by severity. A non-critical alarm warns you of a problem that needs attention. A critical alarm cuts power to the boiler and sounds the alarm on every screen.
  • Calling for help. For critical alarms, a relay output can sound a siren at the still or trigger an existing burglar or fire alarm panel - with a fail-safe option that raises the alarm if the system itself loses power.
  • On your phone. Alerts and alarms can arrive as phone notifications. (This requires an https address - for example, via Tailscale.)
  • One tap to acknowledge. Acknowledging on any screen silences every screen and the siren.
  • A complete record. A timestamped event log of the run, its alerts, alarms and acknowledgements.
What it cannot do
  • It can act only on what it can sense and switch. Its protection depends on its sensors, wiring, network, relays and cut-offs working as intended. Layering reduces the effect of any single failure; it cannot rule out every combination.
  • It cannot see everything. It cannot detect a blocked vapour path, a leak, vapour build-up or a fire, and it cannot test what is in your spirit.
  • It is not a certified safety system or an emergency stop, and it is not safety-rated.
  • It does not make an unattended still safe. Never leave a running still unattended.
Independent safeguards every still needs

These should work on their own, without any software - Stilligent included.

  • An open vapour path to atmosphere, with no valve or blockage that could allow pressure to build.
  • Independent over-temperature protection on the heater.
  • Electrical protection: proper earthing, an RCD / GFCI, and an isolator or emergency stop within reach.
  • Reliable cooling, good ventilation, and no ignition sources nearby.
  • A suitable fire extinguisher, and the knowledge to use it.
  • Compliance with local electrical, fire and building regulations.
  • A competent person present for the entire run.

For the hazards of running any still, and the good practice that keeps them in check, see distilling safely.

Still have a question?

Ask it on the Stilligent forum. We answer there alongside other distillers, and every answer helps the next person with the same question. To talk about using Stilligent on your still, or building it into stills you make, contact us.