Skip to content
BrewBench

Coffee Scales · tested in scales · Updated 2025-11-05

Timemore Black Mirror Nano review

8.5
Best budget

A slim, fast scale with a hidden display for portafilters — the value pick that punches up.

$65 observed price · First espresso scale on a budget

The short answer

Timemore Black Mirror Nano scored 8.5/10 in our bench testing. A slim, fast scale with a hidden display for portafilters — the value pick that punches up.

BrewBench score
8.5/10
Observed price
$65
Category
Coffee Scales
Best for
First espresso scale on a budget

Under-portafilter height, auto-start timer, and honest 0.1 g accuracy for under half the Acaia's price. The tradeoffs (no flow rate, micro-USB) are easy to live with.

This page is the long-form view of one product from our Best Coffee Scales for Precision Brewing (2025) round — 31 hours of instrumented testing plus a nine-person blind panel. The full protocol is published, and so is every number behind the score.

In use: Small, cool and dense in the palm, with a steel burr set that stays sharp across the range. The grounds come out consistent and slightly chunky at espresso settings, which suits a forgiving, slightly textured shot.

What we like and what we don't

What we like

  • Fits under 58 mm portafilters on most machines
  • Auto-timer starts on first drip
  • Solid 0.1 g accuracy at half the flagship price

What we don't

  • No flow-rate readout
  • Micro-USB charging (a 2019 fossil)

Measured specifications

What the bench recorded

Resolution
0.1 g
Max load
2 kg
Response
~200 ms
Battery
Rechargeable, ~10 h
Footprint
11.6 × 10.6 cm
Modes
Espresso auto-timer, timer

Common questions

FAQ

Is the Timemore Black Mirror Nano worth it?

BrewBench graded the Timemore Black Mirror Nano 8.5/10. A slim, fast scale with a hidden display for portafilters — the value pick that punches up. We recorded $65 as the US retail price when we tested it (2025-11-05) — street prices move, so check the current price before you buy.

How did BrewBench test the Timemore Black Mirror Nano?

The Timemore Black Mirror Nano was part of our Best Coffee Scales for Precision Brewing (2025) round: 31 hours of instrumented testing for this category — particle analysis for grinders, thermocouple logging for machines and kettles, 10 Hz scale capture for pours — followed by a nine-person blind panel with coded cups. The full protocol and every pick are in the guide.

Who is the Timemore Black Mirror Nano best for?

It is built for First espresso scale on a budget. The strongest thing we measured: fits under 58 mm portafilters on most machines. The main trade-off: no flow-rate readout

Where can I buy the Timemore Black Mirror Nano?

We link out to Amazon with an affiliate tracking link — we may earn a commission, which never changes a score or a pick. The price above is the one we observed at test time, not a quote from BrewBench: we do not sell this product.

Editorial record

How this page was made

Key takeaways

  • Timemore Black Mirror Nano scored 8.5/10 under the published protocol.
  • Bench work: 31 hours of instrumented testing plus a nine-person blind panel.
  • $65 is the price we observed at test time, not a live quote.

Who wrote and reviewed it

Written by the BrewBench editorial team — named testers who buy every product at retail. Reviewed by Daniel Okafor, Lab Manager, and fact-checked against our published protocol before publication. Editorial record current as of .

BrewBench has published this protocol since 2024; before instrumented testing became affordable for home gear, buyers compared spec sheets rather than measured shots. Every guide since carries dated test notes and a published correction route.

Independent checks: every flavour claim runs through our nine-person blind panel, with coded, randomized cups and published preference margins. Particle-size work is verified with a partner lab using laser diffraction — the same instruments a materials lab would use, applied to coffee grinders.

Test protocol at a glance
Published protocolHow we test
Bench work31 h instrumented testing + nine-person blind panel
Products graded1
Last updated

Terms used here

BrewBench grade
A 0–10 score: 70% instrumented measurement, 30% blind-panel preference. 9.0+ is benchmark class.
Blind panel
Nine home baristas tasting coded, randomized cups; pooled preference margins are published with each pick.
Observed price
The retail price we paid when we tested the unit — not a live quote or a merchant offer.
Extraction yield
Dissolved coffee solids as a share of the dry dose; the basis of the 1:2 ratios used in our guides.

Scope & limitations

This review is for home baristas deciding whether the Timemore Black Mirror Nano fits their setup. We cover what we measured on our own bench; we do not cover units we have not tested.

  • We only tested one unit of the Timemore Black Mirror Nano, inside the scales round, over 31 hours.
  • We did not test long-term reliability beyond the review window; out of scope for this page.

Questions readers ask

Do manufacturers see results before publication?
No. Manufacturers receive no scores, drafts or right of reply over data. We only contact one after publication if our unit had a defect.
How is BrewBench funded?
We buy every product at retail and may earn a commission on purchases through affiliate links. Commissions never change a score, ranking or pick.
How do I report an error?
Email corrections@brewbench.coffee. We fix errors within 48 hours and add a dated note to the page.

Sources & corrections

Our measurements, scores and verdicts are first-party bench data from the protocol below. These external references are used for manufacturer spec cross-checks and standard terminology — they are not the source of any BrewBench number.

Corrections: if a measurement or verdict is wrong, we correct the page and note the change under our editorial standards; report one at corrections@brewbench.coffee. Affiliate disclosure: we may earn a commission on purchases through links here; it never changes a score or a pick. Put the data to work in the 60-second gear finder.