LINK Sample Coffee Roaster by Nucleus × Kaffelogic

Specifications

Taken from Nucleus Coffee Tools' own LINK product page.

Spec	LINK Sample Roaster
Manufacturer	Nucleus Coffee Tools × Kaffelogic (joint development)
Batch Capacity	50–100 g green coffee
Roast Profiles	1,000+ via LINK Studio software
Profile Selection	LINK App — algorithmic, matched to bean density
Roast Curve Source	Sam Corra, Director of Coffee, ONA Coffee (Sydney)
Dimensions (roaster)	120 × 120 × 450 mm (W × L × H)
Weight (roaster only)	2.4–2.6 kg
Weight (with travel case)	8.4–8.8 kg
Roast Chamber	Aluminium
Housing	Powder-coated steel with nylon PA66 fittings
Hopper	Double-layer borosilicate glass, replaceable silicone seal
Voltage	100V (Japan) / 110V / 220V
Travel Case	Military-grade, water-resistant
Software	LINK Studio (Mac/Windows), LINK App (iOS/Android)
Competition Status	Official roaster, World Coffee Roasting Championship (2024–2026) and multiple regional championships
Warranty	—

Who It's For

The LINK is built for evaluating coffee, not producing it — a green coffee buyer or exporter who needs to sample-roast a lot before a container decision, a roastery's QC team standardizing how incoming lots get assessed, or a competitor preparing on the same roaster used at the World Coffee Roasting Championship. The bean-density profile matching matters most here: it gives someone unfamiliar with a specific origin a sensible starting curve immediately, rather than requiring them to develop one on-site.

The travel case and sub-9kg all-in weight are the other half of the pitch — this is a roaster designed to go to origin in a carry-on rather than stay bolted to a lab bench. A home enthusiast who wants professional-grade sample roasting without building profiles from scratch can use it the same way, though its 50–100g batch size makes it a tool for evaluation and small tasting batches, not a production roaster for retail-volume bags.

Did You Know

• The LINK is the official sample roaster of the World Coffee Roasting Championship for 2024–2026, plus multiple regional roasting championships — a stated competition credential from the sanctioning bodies, not a general endorsement claim.

• The app selects a starting roast profile based on the green coffee's bean density, not just origin or variety — density correlates with how a bean absorbs and conducts heat, so it's a more direct predictor of how a roast curve should behave than geography alone.

• Its hopper is double-layer borosilicate glass with a replaceable silicone seal — borosilicate resists the thermal stress of repeated hot-to-cool cycling better than standard glass, and a replaceable seal means the hopper doesn't need full replacement as it wears.

• The roast curves preloaded onto the LINK were developed by Sam Corra, Director of Coffee at ONA Coffee in Sydney — the curves come from a working specialty roaster's own profiling, not a generic default set.

How much green coffee can the LINK roast at once?

50–100 grams per batch — it's a sample roaster for evaluation, not a production-volume machine.

How does the LINK choose a roast profile?

The LINK App selects from over 1,000 preloaded profiles based on the green coffee's bean density, giving a sensible starting curve without requiring the user to build one from scratch.

Who developed the LINK's roast profiles?

Sam Corra, Director of Coffee at ONA Coffee in Sydney, developed the roast curves preloaded onto the LINK.

Is the LINK used in coffee roasting competitions?

Yes — it's the official sample roaster of the World Coffee Roasting Championship for 2024–2026, along with several regional championships.

How much does the LINK weigh with its travel case?

8.4–8.8 kg complete with the military-grade, water-resistant travel case; the roaster alone weighs 2.4–2.6 kg.

What voltages does the LINK support?

100V (Japan), 110V, and 220V.

Can a home enthusiast use the LINK, or is it only for professionals?

It's designed for green coffee buyers, QC teams, and competitors, but the density-based profile matching makes it usable by a home roaster who wants professional-grade results without building profiles manually. See the coffee roasters category for other roasting equipment.