Brewing & Fermentation Automation
Eliminate temperature drift with PID-controlled glycol systems and get a real-time view of every vessel in your cellar — all logged for QA.
The Problem
Temperature drift during fermentation
Even a few degrees of drift during critical fermentation stages can produce off-flavors and ruin a batch.
Manual glycol valve control
Manually opening and closing glycol valves to hit target temps is time-consuming and imprecise.
No visibility into multiple vessels
Monitoring fermenters, bright tanks, and conditioning tanks individually means no single picture of your cellar.
No audit trail for QA
Without logged fermentation data, tracing a quality issue back to a specific temperature event is impossible.
How LoopString Solves It
PID-controlled fermentation
On-edge PID loops drive glycol valves to hold fermentation temperature within ±0.1 °C of setpoint — no cloud dependency.
Multi-vessel real-time dashboard
See temperature, pressure, and flow readings from every fermenter and bright tank on one screen.
Crash & diacetyl rest alerts
Configure alerts for temperature setpoint changes so your team is notified the moment a rest phase begins or ends.
Fermentation logs for QA
Full sensor history lets you trace any quality issue to an exact temperature profile and reproduce your best batches.
Hardware You'll Use
DS18B20
Waterproof temp probe for fermenter and bright tank monitoring
1-WireFlow meter
Turbine or magnetic flow meter for transfer and dosing volumes
Pulse / AnalogPressure transducer
Vessel pressure monitoring for carbonation and fermentation
Analog / 4-20 mASHT31
Ambient cellar temperature and humidity
I²C
Free tools for this work
Fermentation Temperature Guide
Target temperature bands by style and culture, from ales to lagers.
Brix ↔ SG Converter
Convert refractometer Brix to specific gravity and Plato, both directions.
Hydrometer Temp Correction
Correct a gravity reading for sample temperature vs calibration.
Keg Carbonation Calculator
Target CO2 volumes and beer temperature to the regulator PSI to set.
Frequently asked questions
- Can LoopString control fermentation temperature for brewing?
- Yes. A temperature probe on the fermenter drives an on-Pi PID or hysteresis loop that switches a heating belt or glycol/cooling relay to hold your target with tight control (typically within about a degree, depending on your probe and hardware). Setpoints and ramps are edited from the dashboard.
- Can I program a multi-step fermentation schedule?
- Yes. Recipes let you sequence temperature steps — for example a diacetyl rest then a cold crash — with each step running automatically on the Pi. You get an alert if the batch drifts off the programmed profile.
- Does LoopString keep a record of each batch for consistency?
- Rolled-up history for every batch is stored in the cloud so you can compare fermentations side by side, while the second-by-second control stays on the device. That gives you a durable batch log without paying for continuous cloud writes.
Ready to dial in your fermentation?
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