PORTAL · Pour-Over Log Interpretation Guide

#0 · General Preface

⚠️ This guide is a collection of insights from the Belka team and PORTAL users, and is not perfect. ⚠️ Even the same EC log shape can taste very different when the brewing setup changes. 🐥 The most basic approach: use the log from your best-tasting brew as a reference, and try to reproduce it as closely as possible.

⚡ What is EC?

Q. What does PORTAL measure?

PORTAL measures the EC (Electrical Conductivity) and temperature of flowing coffee in real time.

Q. What is EC?

EC stands for Electrical Conductivity. The more dissolved substances in a liquid, the better it conducts electricity. PORTAL uses this property to estimate changes in coffee concentration in real time.

EC and TDS are not the same concept. However, since EC and TDS maintain a consistent ratio in most coffees, the EC log closely reflects the overall concentration pattern throughout the extraction.

belka on Instagram: ""PORTAL_Accuracy" How accurate is PORTAL? 🎯 Can EC really estimate TDS change? Here, the belka team demonstrates the calibration process of PORTAL. 🔬 Yes! The real-time EC of PORTAL is very similar to the actual EC of the coffee at that moment, and the shape of the TDS change is very similar! 👍🏻😎 PORTAL's Kickstarter campaign will be launching soon. At long last, the reservation link for those considering purchasing PORTAL is ready today! 💌DM us if you'd like to reserve yours! #PORTAL #accuracy #salamishot #ECvsTDS"

belka on Instagram: "“PORTAL_Accuracy Part 2" After overlaying the brew concentration logs measured by PORTAL with actual EC and TDS, vertically zooming in on the TDS values makes all values appear very similar. Yes, this is exactly why PORTAL is said to display real-time concentration changes during extraction. 🤩 The launch of PORTAL's Kickstarter campaign is now very close. Anyone can now reserve the lowest Kickstarter price for PORTAL in advance! (🔗Link in bio!) #PORTAL #espresso #pourover #coffeebrewprofiler"