Densimeter Lab

Buy the right gold densimeter before the first scrap intake.

Spec-led guides for Archimedes density testers—capacity, resolution, and the solid-sample rules that keep karat readouts honest.

We rank machines by capacity, density resolution, and solid-sample fit—not brand slogans.

Hollow jewelry, gem settings, and plated fashion metal break density math. We say so up front.

Densimeters screen deals fast. High-ticket bars still need XRF or assay when risk is high.

Amazon links may earn us a commission. Specs and caveats stay independent of that payout.

Topic hubs

Pick the desk problem you are solving

Every hub opens with sizing or limits before product shortlists—so you do not buy the wrong tank twice.

Featured guides

Beginner shortlists, capacity math, and the failure modes that waste a densimeter purchase.

A first machine for solid jewelry only: capacity, resolution, and a shortlist built from published specs.

Match machine capacity to the heaviest solid piece you regularly buy—without paying for unused range.

Hollow jewelry, gem-set pieces, air pockets, and plated fashion metals—why density fails there.

Pick the right first-pass tool by speed, destructiveness, and which fakes each method misses.

Throughput-minded picks for mixed gold intake: durable tanks, clear karat modes, and solid-sample discipline.

A practical air-then-water workflow, tank setup notes, and common unstable-reading fixes.