MEASURE · ESPRESSO

Acaia Lunar

A compact rechargeable scale for weighing espresso doses and monitoring flow during extraction.

Compatibility details

Footprint105 × 105 mm

Height15 mm

Maximum load2,000 g

Readability0.1 g

PRODUCT OVERVIEW

What it is and how it works

The Lunar is a small espresso scale with a real-time flow-rate display and configurable automatic brewing modes. The current model has a rechargeable USB-C battery; Acaia lists 30–40 hours of continuous use depending on settings.

Acaia lists dimensions of 105 × 105 × 15 mm and a maximum capacity of 2,000 g. Measure the actual flat space on your machine’s drip tray, including room for your cup and any movement of the tray.

CHECK BEFORE YOU BUY

Compatibility at a glance

It can sit on a machine’s drip tray only when the tray has a stable, level area large enough for the scale and clearance for a cup. Dimensions are the most useful compatibility check.

Espresso drip trays

Allow at least a 105 × 105 mm footprint and 15 mm scale height, then check that a cup can still fit under the group. Tray rails, rounded corners, and removable cup stands can reduce usable space.

Portafilters

Acaia says a standard portafilter is not designed to sit directly on the Lunar. The Lunar Weighing Plate is a separate accessory for this use; it is not included in the scale box.

Other weighing

The scale can weigh coffee and cups up to its 2,000 g limit. Keep liquid away from openings and follow Acaia’s cleaning instructions; water-resistant does not mean submersible.

MAKER DETAILS

Specifications and features

Readability: 0.1 g (display supports a 0.01 g mode on listed configurations)
Capacity: 2,000 g / 70.55 oz
Battery: Rechargeable lithium-ion, USB-C; 30–40 hours listed
In the box: Heat-resistant pad, protective strips, USB-C cable, and 100 g calibration weight

PRACTICAL GUIDE

Fit and care checks

Measure the machine’s usable tray area with the drip tray installed, and check the available vertical space beneath the group head.
Place the scale on a level surface and keep the load below 2,000 g. The flow indicator is intended to show extraction flow in real time.
Use the included heat-resistant pad where appropriate. Clean and dry the scale according to Acaia’s manual; do not submerge it.

BEFORE ORDERING

A quick fit and care checklist

Measure tray width, depth, and height clearance rather than relying on the machine’s exterior dimensions.
Add the separately sold Lunar Weighing Plate if your workflow requires weighing a portafilter or two cups on the scale.
Check the exact model and regional warranty terms on Acaia’s product page.

PRIMARY SOURCES

Details from the manufacturer

Specifications and compatibility notes are summarized from the linked maker pages. Regional versions and product details can change.

Official product detailsAcaia Lunar product page and specifications
Official fit guidanceAcaia Help Center: Lunar 2021 specifications and portafilter fit
Official user manualAcaia Lunar 2021 manual (PDF)

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