I used a traditional glass pH meter for the first two years of brewing and thought I was doing fine until I borrowed a digital electrode-based meter from a fellow brewer and discovered my readings had been drifting by 0.3–0.
John Brewster
John Brewster
John Brewster is the homebrewer and writer behind BrewMyBeer — over a decade of all-grain brewing, 80+ BIAB batches, and 1,000+ guides on fermentation science, water chemistry, hops, yeast, and homebrewing equipment. Every guide is written from genuine hands-on experience.
- Beer Brewing
DIY Arduino Brewing Automation Project: Guide to Smart Homebrewing Systems
by John Brewster 4 minutes readMy Arduino brewing controller started as a weekend project to automate temperature control for a single RIMS tube and ended up as a full brew day controller managing three temperature zones, two pumps, and an automated hop addition alert system.
- Beer Brewing
Digital Fermentation Logbook Setup: Guide to Modern Brewing Record Keeping
by John Brewster 4 minutes readI brewed for three years without keeping proper records, and I regret it. When a batch turned out exceptionally well, I couldn’t reliably reproduce it because I didn’t know whether the improvement came from the grain adjustment, the different yeast …
- Beer Brewing
Review of Brewing Sensors for pH and Gravity: Testing and Analysis Guide
by John Brewster 3 minutes readInline sensors for pH and gravity monitoring represent the frontier of homebrew automation — the kind of measurement that commercial breweries have had for decades but that has only become affordable for homebrewers in the past few years.
- Beer Brewing
How to Predict Beer Quality with Data: Guide to Data-Driven Brewing Excellence
by John Brewster 4 minutes readData-driven brewing changed how I think about recipe development. Before I started keeping consistent numerical records, my process improvement was intuitive — “that batch was better, I think it was the hops” — and I was making the same mistakes …
- Beer Brewing
How to Automate Mashing Process: Guide to Smart Brewing Systems
by John Brewster 3 minutes readAutomating the mash process was the single upgrade that changed brew day from a 6-hour attention-intensive effort into something I could manage alongside other work.
- Beer Brewing
Cloud-Based Recipe Management for Brewers: Guide to Digital Brewing Excellence
by John Brewster 3 minutes readMoving my recipe library to the cloud was one of those infrastructure decisions that seems trivial until you’ve lost a hard drive with two years of recipes on it.
- Beer Brewing
AI in Brewing Current Applications Transforming Beer Production in 2025
by John Brewster 4 minutes readAI in brewing has moved from speculative to practical faster than most homebrewers have noticed. When I ran my first recipe through an AI recipe generator in 2023 as a curiosity, the output was formulaic and unremarkable.
- Beer Brewing
Smart Hydrometers Are They Worth It? A Comprehensive Analysis for Modern Brewers
by John Brewster 4 minutes readSmart hydrometers generate more debate in homebrewing communities than almost any other piece of equipment — half the brewers I talk to swear by them, the other half think they’re expensive toys for people who can’t be bothered to take …
- Beer Brewing
Using IoT Devices for Fermentation Monitoring: Smart Brewing
by John Brewster 3 minutes readI added a Tilt wireless hydrometer to my fermentation setup two years ago and it changed how I think about fermentation management.