DiFluid Launches RS Extract Coffee Refractometer
The new device expands temperature measurement ranges to eliminate sample cooling requirements for coffee enthusiasts.
Updated on Oct. 27, 2026 in Coffee
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DiFluid has released the RS Extract, a new coffee refractometer designed to measure total dissolved solids without requiring samples to cool first. The device utilizes a new sensor system to provide accurate readings across a significantly wider temperature range than previous models.
Why it matters
By removing the need to cool coffee samples before testing, this device streamlines the workflow for professionals and home baristas who need to analyze brewing variables quickly. It offers a more efficient alternative to traditional methods that rely on precise temperature regulation.
The RS Extract retails for $639 and features a 3.5-inch color touchscreen interface. It supports a sample temperature range of 4-65°C, or 39.2-149°F, and connects to DiFluid brewing scales for data syncing via the CoffeeOS app.
The players
DiFluid
A Shenzhen, China-based company that develops precision measurement technology for the coffee brewing industry.
The details
The device features a Cooling Curve Compensation system that uses an integrated temperature sensor at the sample well to provide stabilized readings. It also includes a magnetic metal lid and integrates directly with the company's ecosystem of brewing hardware.
Timeline
October 2026: The RS Extract was unveiled at the Roast Summit in Portland, Oregon.
October 25, 2026: Official shipping of the new units began.
Culture Shift
The RS Extract builds upon the technology found in the R2 Extract refractometer to meet the industry's demand for faster, more accurate data collection. This move reflects a broader trend of integrating advanced digital diagnostics into everyday home and professional brewing workflows.
Home baristas can now test their extractions immediately after brewing without waiting for the liquid to reach specific lower temperatures. The integration with the CoffeeOS app allows users to track their brewing metrics more easily across different sessions.
The takeaway
This device represents a shift toward more convenient analytical tools in home coffee preparation. Enthusiasts looking to improve consistency should prioritize tools that minimize the number of manual steps required during the testing process.
Further reading
For more on the latest tools used by baristas, see our guide on Coffee.
Source note: This article includes information reported by Daily Coffee News by Roast Magazine.
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