DiFluid CoffMeter W1

Protect Bean Integrity with the CoffMeter W1 Water Activity Meter

For coffee producers, green buyers, and professional roasters, water activity (aw) is the most critical predictor of shelf-life, flavor stability, and microbial safety. The CoffMeter W1 by DiFluid is a laboratory-grade, portable analyzer designed to measure the energy status of water within coffee beans. Unlike simple moisture percentage, water activity determines the risk of mold growth and the rate of chemical degradation. By providing precise aw readings in approximately two minutes, the CoffMeter W1 empowers you to protect your inventory from mycotoxins and preserve the delicate acids and sugars that define specialty coffee, all without the need for a stationary laboratory.

Scientific Precision in a Portable Format

The CoffMeter W1 delivers professional accuracy of ±0.02 aw with a resolution of 0.001 aw, making it one of the most precise portable meters in the global coffee industry. Engineered with high-precision sensors and advanced environmental compensation, the device automatically accounts for fluctuations in temperature, humidity, and atmospheric pressure. This ensures that whether you are at a high-altitude washing station or a humid coastal warehouse, your readings remain stable and reliable. Weighing only 750 grams, it is a pocket-sized powerhouse that brings scientific rigor to the field and the roastery floor.

Advanced Design and Seamless Calibration

User experience and technical maintenance are at the forefront of the W1’s design. It features a unique, magnetic floating sample tray that facilitates effortless loading and unloading of beans while ensuring a perfect seal for measurement integrity. Maintenance is simplified through a one-touch calibration process using a reusable saturated salt solution, allowing you to verify accuracy in any environment. This robust engineering is matched by a long-lasting battery and a durable build, ensuring the device is always ready for intensive quality control sessions during harvest or large-scale inventory audits.

Data-Driven Quality Control with CoffeeOS

The CoffMeter W1 is a forward-thinking tool that integrates into the wider DiFluid digital ecosystem. Through Bluetooth connectivity, the device syncs with the CoffeeOS app, allowing users to log water activity data, track quality trends over time, and centralize quality control records for an entire team. This connectivity also enables Over-The-Air (OTA) firmware updates, ensuring your device always has the latest algorithmic improvements. By maintaining a digital record of aw levels—monitoring the critical 0.60 aw safety threshold—roasters can optimize storage conditions and predict roast development with unprecedented accuracy.

Key Features

• High-speed analysis providing precise water activity (aw) results in approximately 2 minutes.
• Laboratory-grade accuracy of ±0.02 aw with built-in environmental compensation for temperature and pressure.
• Magnetic floating sample tray design for superior sealing and repeatable measurement integrity.
• Versatile testing capabilities suitable for green coffee, roasted beans, and various grains like rice or wheat.
• Bluetooth integration for digital data logging and quality trend analysis via the CoffeeOS ecosystem.

Technical Specifications

• Measurement Range: 0.05 – 0.99 aw
• Precision / Resolution: ±0.02 aw / 0.001 aw
• Sample Requirement: Minimal 6–8 grams of coffee beans
• Weight: 750g (Compact and mobile-ready)
• Connectivity: Bluetooth and Wi-Fi for OTA updates and app synchronization
• Calibration: One-touch system with standard salt solution vial

Ideal For

• Farmers and Producers: Monitoring drying processes to prevent mold and ensure export-ready quality.
• Green Coffee Traders: Verifying the stability and safety of lots during transit and warehouse storage.
• Professional Roasters: Auditing incoming green coffee and managing inventory shelf-life to preserve flavor.
• Quality Control Labs: Replacing bulky benchtop equipment with a portable, precise alternative for field testing.