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How Water Activity Meters Work – Principles Behind aw Measurement for Coffee and Food
LeBrew·
How Water Activity Meters Work – Principles Behind aw Measurement for Coffee and Food

Accurately measuring water activity (aw) is essential for quality control, safe storage, and precise roasting of green coffee beans. Understanding the scientific principles behind aw measurement—and selecting the right method and equipment—is critical to ensuring reliable data. This article explores the core mechanisms of water activity meters, compares mainstream technologies, and highlights differences in precision among various approaches.  

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Agtron Colorimeter vs. Traditional Visual Assessment: Which Is the Ultimate Judge of Coffee Roast Color?
LeBrew·
Agtron Colorimeter vs. Traditional Visual Assessment: Which Is the Ultimate Judge of Coffee Roast Color?

Abstract In coffee roasting, color change has always been a key indicator for determining the roast level. Traditionally, roasters rely on visual observation of the beans’ transformation—from the yellow-green of raw beans to light brown, dark brown, and even near black—combined with crack sounds and aroma for a subjective assessment. However, this method has significant limitations: Strong influence of lighting:...

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The Science Behind Agtron Roast Analyzer and Coffee Roasting Control
LeBrew·
The Science Behind Agtron Roast Analyzer and Coffee Roasting Control

Abstract The essence of coffee roasting lies in a series of complex, heat-induced chemical reactions, the most visually apparent of which is the color transformation of the coffee beans. To enable quantifiable control over the roasting process, the Agtron roast analyzer—also known as the Agtron Scale or coffee roast meter—was developed and has become an industry-standard tool for standardized roast...

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An Analysis of Different Motor Drive Types in Coffee Grinders
LeBrew·
An Analysis of Different Motor Drive Types in Coffee Grinders

As of 2025, the global market for coffee grinder motor drive types has become increasingly mature, with both manufacturing techniques and structural designs advancing toward precision and diversification. Numerous innovative grinder designs have emerged, such as ULTRA’s cost-effective direct drive system, SOU SIK P1’s use of a planetary gear motor for conical burr grinders, and BOOKO Motto80’s tapered burr mounting system,...

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Electrostatic Control in Coffee Grinders: Coatings, Electrodes, Grounding & Structural Optimization
LeBrew·
Electrostatic Control in Coffee Grinders: Coatings, Electrodes, Grounding & Structural Optimization

During the coffee grinding process, high-speed friction between the burrs and coffee beans generates significant static electricity. This is one of the primary causes of coffee grounds scattering, residue buildup, and uneven extraction. Finer particles, with their larger surface area, are especially prone to static charge accumulation, resulting in messy powder dispersion, ingredient waste, and inconsistent cup quality.  

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The Story of SOU SIK and LeBrew
LeBrew·
The Story of SOU SIK and LeBrew

In 2024, SOU SIK, a brand infused with retro-futuristic mechanical aesthetics, was born in Shanghai, China. From its inception, it partnered with LeBrew, a specialist in burr design and manufacturing, to collaborate on burr geometry and development.

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Why we need to replace the burrs?
LeBrew·
Why we need to replace the burrs?

With prolonged use of a coffee grinder, its core components—the burrs—gradually lose their sharpness and begin to dull visibly. In some cases, chipping along the edges may also occur. This is particularly common in commercial espresso grinders, where burrs are subjected to heavy grinding loads, frequent cleaning, and repeated recalibration. Common wear issues include erosion in the triangular zone, coating...

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Hyper Burrs | What affects grinding efficiency?
LeBrew·
Hyper Burrs | What affects grinding efficiency?

What makes some burrs grind faster and more precisely than others? This article breaks down the geometry of coffee burrs—including crushing zones, dump powder channels, and grind paths—to reveal how they affect grinding efficiency across espresso and filter applications.

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LeBrew RoastSee C1 | How a Coffee Roast Color Analyzer Works & Why Accuracy Matters
LeBrew·
LeBrew RoastSee C1 | How a Coffee Roast Color Analyzer Works & Why Accuracy Matters

Understanding how a coffee roast color analyzer works—and what factors impact its accuracy—can help roasters achieve consistent, professional-grade results. This guide explains the principles behind NIR technology and shares expert tips for minimizing reading errors.

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Blind Burrs | The Pinnacle of Grinding Design
LeBrew·
Blind Burrs | The Pinnacle of Grinding Design

In 2025, LeBrew launched its first blind-hole burr — the Hyper Burrs 98mm Filter Blind.

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LeBrew RoastSee AquaGauge
Ryans·
coffee green bean water activity = Maillard reaction driving force?

Learn how water activity impacts the Maillard reaction and the controllability of the roasting process in coffee. By accurately measuring water activity, optimize green bean storage and roasting rhythm to improve flavor and quality. Discover how LeBrew RoastSee AquaGauge helps enhance the roasting process.

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LeBrew 64mm burrs
Ryans·
Exploring the Connection Between Burrs and Coffee Flavor

Explore how coffee burr design, cutting methods, and particle size affect brewing, extraction rates, flavor, and aroma. Choose the burr for your coffee needs.

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"RoastSee C1: Enhancing Roast Level and Coffee Flavor"
Ryans·
RoastSee C1: Enhancing Roast Level and Coffee Flavor

"Discover how coffee roasting and color value impact flavor, and how LeBrew RoastSee C1 helps optimize your roasting process."

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Sou Sik
Ryans·
LeBrew×SOU SIK: Precision Engineering Meets Mechanical Punk

Discover the future of coffee grinding with LeBrew and SOU SIK’s collaboration. The new manual grinder combines precision engineering, durable materials, and ergonomic design to deliver an exceptional coffee experience.

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Coffee Competitions
Ryans·
LeBrew: Innovation on the Global Coffee Expo Stage

LeBrew supports coffee competitions with essential tools like RoastSee C1, AquaDense, and HyperBurrs burrs, empowering roasters and brewers to excel.

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Coffee Competitions
Ryans·
LeBrew: Empowering Coffee Competitions with Professional Equipment

LeBrew supports coffee competitions with essential tools like RoastSee C1, AquaDense, and HyperBurrs burrs, empowering roasters and brewers to excel.

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