Acaia Lunar 2021 – When 0.1 grams makes the difference
Imagine this: You take a shot. Yesterday it was perfect – sweet, balanced, complex. Today it tastes sour, thin, somehow wrong. What happened?
You ground 18.3g instead of 18.0g. Your scale didn't tell you. It was "close" – but in espresso preparation, there's no such thing as "close". It has to taste good.
That's the moment you understand: the scale isn't just an accessory. It's the foundation. Without precision, everything else is pointless – the best machine, the best grinder, the best beans. All for nothing if you don't know what you're doing.
The Acaia Lunar 2021 solves this problem. It's not an ordinary scale – it's a hand-calibrated precision instrument. Each individual scale is adjusted, tested, and perfected by hand. The deviation? ±0.1g. That's not just "accurate." That's scientific precision.
With the Lunar 2021, you know: 18.0g is 18.0g. Not 17.9g. Not 18.1g. Exactly 18.0g. Every day. Every shot. Perfectly reproducible.
Why the Acaia Lunar 2021 is not a normal scale
With an Acaia espresso scale, you're not getting a mass-produced factory item. You're getting a precision-crafted measuring instrument, calibrated by hand. Each individual scale is tested, adjusted, and perfected until it meets the tolerances specified by Acaia.
While standard scales often have deviations of ±0.5g (and nobody checks it), the Lunar minimizes these errors to ±0.1g. That's the difference between "approximately" and "exactly." That's the difference between hobby and professional.
The chemist's perspective: Why 0.1g can change everything
As coffee roasters and flavor specialists, we understand: extraction is chemistry. And chemistry is either precise – or it's wrong.
A classic espresso shot: 18.0g input to 36.0g output. Brew ratio 1:2. Perfectly balanced – sweetness, aroma, and body in harmony.
But what happens if your scale has a deviation of ±0.5g?
Scenario 1: You weigh out 17.5g instead of 18.0g:
Less coffee grounds = less resistance = water flows through faster. The shot tastes weaker. The sweetness is reduced. The complexity is lacking. You ask yourself: "What's different?"
Scenario 2: You weigh out 18.5g instead of 18.0g:
More coffee grounds = more resistance = water flows more slowly. The shot has more body.
With the Acaia Lunar (±0.05g):
18.0g is 18.0g. The shot tastes balanced – sweetness, aroma, body in harmony. Every day. Every time. That's consistency. That's control. That's why you want an Acaia.
The calculation example: How precision affects espresso
Let's do the math. A classic espresso shot: 18.0g input to 36.0g output. Brew ratio 1:2.
Standard scale (±0.5g deviation):
- Input: 17.5g to 18.5g (you think it's 18.0g)
- Output: 35.5g to 36.5g (you think it's 36.0g)
- The brew ratio varies between 1:1.9 and 1:2.1
- Error rate: 2.8%
That doesn't sound like much? In espresso preparation, it's noticeable. The difference between a 1:1.9 ratio and a 1:2.1 ratio is the difference between more or less body and aroma. Between thin and dense.
Acaia Lunar (±0.1g deviation):
- Input: 17.90g to 18.10g
- Output: 35.90g to 36.10g
- The brew ratio varies between 1:1.997 and 1:2.003.
- Error rate: 0.28%
That's the difference. That's why professionals use Acaia. That's why you want an Acaia.
The Coffee Coaching Club tip: Applied aroma chemistry in real time
The Lunar 2021 can do even more. It doesn't just show you the weight – it also displays the flow rate indicator in real time. This is the speed at which water flows through your puck.
As aroma specialists, we know that fluctuating water flow indicates structural problems in the coffee puck (channeling). The water seeks the path of least resistance – it doesn't flow evenly through the puck, but rather carves channels. The result? The shot tastes chaotic.
With the Lunar's flow rate indicator, you'll see it instantly. Is the flow rate fluctuating? You know the puck isn't perfect. You adjust it for the next shot – better WDT distribution, more precise tamping. The flow rate becomes consistent. The shot is perfect.
This isn't just making coffee. This is applied science. This is control at the highest level.
Features of version 2021 – The upgrade in detail
Who is the Acaia Lunar 2021 right for?
You don't need the Lunar scale. A cheaper scale will do – sort of.
But treat yourself to the Lunar if:
- You're looking for reproducibility . If you want your shot to taste the same today as it did yesterday. If you don't want to guess, but want to know. If you want control over the taste – not chance.
- You have a high-end machine – a Linea Mini R , Micra , or GS3 . These machines are precision instruments. An inaccurate scale is a compromise. That would be like a Ferrari with bicycle tires.
- If you're using a precision grinder – a Weber EG-1 , Varia VS6 , or Lagom P80 – these grinders produce perfect particle distribution. An inaccurate scale negates this precision.
Or maybe you simply want it because you deserve the best, because it feels beautiful and looks crisp. Because precision means respect – respect for the craftsmanship, respect for the beans, respect for your time.
That's reason enough.
What you get from us
- Acaia Lunar 2021 (hand-calibrated in Taiwan)
- USB-C charging cable
- Heat-resistant silicone mat
- 2-year warranty
- Access to the Acaia App (iOS/Android)
- Support from the official Acaia partner Switzerland
- Available immediately from our Bern & Zurich warehouses
As an official Acaia partner in Switzerland, we guarantee original products, full support and fast availability.
Frequently asked questions about Acaia Lunar 2021
Do I really need such a precise scale?
If you're looking for reproducibility – yes. If you want your shot to taste the same today as it did yesterday – yes. If you have a high-end machine and want to get the best out of your beans – yes. The Lunar eliminates the biggest source of error: inaccurate weighing. That's pure luxury.
What is the flow rate indicator?
The Lunar shows you in real time how quickly the weight increases – that is, how fast the water is flowing through the puck. Is the flow rate fluctuating? You have channeling. The puck isn't perfect. You see it immediately and can correct it on the next shot. That's visual control over the extraction.
Is it really waterproof?
Yes. The Lunar 2021 is water and heat resistant. You can place it directly on the drip tray – splashes are no problem. It's built for everyday barista use.
Does it work with the La Marzocco app (brew-by-weight)?
Yes! If you have a Linea Mini R with Brew-by-Weight, you need the special Acaia Lunar La Marzocco version . This connects directly to the machine and automatically stops the extraction at the target weight. This is the ultimate setup for consistent results.
How long does the battery last?
Up to 30 hours of continuous operation. In practice: You charge it once a week. Maybe. That's not just practical – that's brilliant.
Precision means control
Get the Acaia Lunar 2021. Available immediately from our Swiss warehouse.
📦 Available immediately in Bern & Zurich | 🛡️ 2-year warranty | 🇨🇭 Official Acaia partner
Roastery tip: The Acaia Lunar makes the difference between "good" and "perfect." Our Cozy Chocolate tastes the same every day with the Lunar – sweet, chocolatey, and velvety. The Nutty Delight develops consistent body and creaminess. And the Wild Peach ? With the Lunar, you can precisely adjust the brew ratio – 1:2 for body, 1:2.2 for clarity, 1:2.5 for maximum fruitiness. You're in control. You know what you're doing. That's the difference precision makes.
Important note: Only charge the Lunar with a maximum of 5V/1A (e.g., a standard USB port). Fast chargers (>5V/1A) can damage the battery. Please refer to the user manual.
Available at Coffee Coaching Club: Visit us in Bern or Zurich for personal consultation or use Click & Collect. Available for immediate delivery from our Swiss warehouse.
