Discover Operation Modes of Umbra Lunar: Auto Tare and Timer with Flow Detection
Magic Relay Function in Action with Umbra Series
Discover Operation Modes of Umbra Lunar: Auto Timer with Flow Detection
How to fair your scale with Umbra Series
✨ New Arrivals Just Dropped!Explore
Acaia Umbra Lunar Weighing Scale - Magic Relay & ReacX Technology
The Acaia Umbra Lunar is a revolutionary, display-free scale designed to bring a minimalist, "no-clutter" aesthetic to the professional coffee bar. Engineered with advanced Magic Relay technology, the Umbra Lunar wirelessly communicates with other Acaia devices—such as the Pearl S or Lunar—to share a screen. This allows baristas to monitor real-time measurement data on their primary display while the Umbra handles the weighing, creating a seamless, dual-device workflow that is perfect for precise portafilter dosing and commercial efficiency.
Constructed from water-resistant anodised aluminium, the Umbra is built to withstand the rigours of a busy café environment while maintaining industrial-grade accuracy. It features the cutting-edge Acaia ReacX weighing technology, ensuring unmatched repeatability and precision with every shot. Because it lacks a built-in display, the unit is exceptionally energy-efficient, offering extended battery life for sustainable, long-term use. Whether used as a standalone tool via the Acaia app or as an extension of your existing setup, the Umbra Lunar represents the next generation of smart, sustainable coffee weighing.
Acaia Umbra Lunar Scale User Manual
Acaia Umbra Lunar Scale Quick Start Guide
You get all of these Freebies when you purchase through Prime Coffee Suppliers:
-
Free! Delivery (Worth £60) 1-3 days Free Standard UK Delivery, Direct from UK Warehouse, Or 2-4 Days direct from warehouse in Milan.
- Free! 12 Months Parts Warranty
Features
Magic Relay Switching: Instantly shares weight data with a paired Acaia Pearl or Lunar display for a distraction-free bar.
Acaia ReacX Technology: Industrial-grade sensors provide the highest level of accuracy and weight repeatability available.
Energy-Efficient Design: The display-free silhouette significantly reduces power draw, ideal for eco-conscious commercial setups.
Espresso-Proof Build: Machined from durable aluminium to survive the heat, steam, and spills of a professional drip tray.
Specification of Acaia Umbra Lunar Weighing Scale
| Feature | Details |
| Connectivity | Bluetooth Low Energy 5.4 with Magic Relay |
| Material | Water-resistant Anodised Aluminium & Polycarbonate |
| Maximum Capacity | 1000g / 35.27oz |
| Readability | 0.1g (High-res mode 0.01g) |
| Battery Life | 40 – 48 Hours active / 14 Days standby |
| Charging Port | USB-C |
| Dimensions | 105mm (W) x 105mm (L) x 15mm (H) |
The Minimalist Revolution: Why the Acaia Umbra Lunar is the New Bar Standard
In the world of high-end espresso, the Acaia Umbra Lunar represents a bold shift toward minimalist design and "invisible" technology. While the classic Lunar 2021 was defined by its bright LED feedback, the Umbra reimagines the coffee bar by removing the built-in display entirely. It is not just a scale; it is an intelligent extension of a connected ecosystem, designed for baristas who value a distraction-free workspace without sacrificing an ounce of precision.
1. Magic Relay Technology
The defining feature of the Umbra series is Magic Relay. Since the scale itself has no screen, it uses Bluetooth Low Energy 5.4 to transmit weight data instantly to a paired device.
-
Why you need it: You can pair the Umbra with an Acaia Pearl S or a smartphone. When you place a cup on the Umbra, the weight appears seamlessly on your secondary device. This allows for a "dual-display" setup where one screen manages everything, keeping your espresso machine's drip tray looking clean, sleek, and uncluttered.
2. Acaia ReacX™ Industrial Precision
Hidden beneath the matte black aluminium is the new Acaia ReacX™ weighing technology. This is the most advanced sensor suite Acaia has ever produced.
-
Why you need it: ReacX technology offers industrial-grade repeatability and nearly zero latency. In a commercial environment where you are pulling hundreds of shots, the Umbra ensures the weight you see is the absolute truth, stabilizing faster than almost any other scale on the market.
3. Sustainable, Ultra-Efficient Performance
By removing the power-hungry LED display, the Umbra drastically reduces its energy footprint.
-
Why you need it: The Umbra offers a remarkable battery life of 40–48 hours of continuous use. For a busy cafe, this means fewer charging cycles and a significantly longer overall lifespan for the internal lithium-ion battery, making it the most sustainable choice in the Acaia lineup.
4. Advanced Water Resistance & Durability
The Umbra is milled from a single block of anodised aluminium. Because it lacks a display window or physical buttons, there are fewer entry points for liquid.
-
Why you need it: It is the most "espresso-proof" scale available. The display-free design makes it incredibly easy to wipe clean, and the internal components are treated to survive the steam, heat, and constant splashes inherent to commercial espresso service.
5. Boundless Connectivity
The Umbra is designed to be the "hidden brain" of your setup. Through the Acaia Brewmaster app, you can customize every parameter of your workflow.
-
Why you need it: Whether you’re using it for portafilter dosing or as a secondary scale for split-shot monitoring, the Umbra provides total flexibility. It connects effortlessly to the latest Acaia ecosystem, ensuring your coffee bar remains at the cutting edge of brewing technology.
The Verdict: Is it worth it?
The Acaia Umbra Lunar is for the barista who wants the data of a laboratory with the aesthetic of a high-end design studio. It eliminates the visual noise of multiple blinking screens, allowing you to focus entirely on the craft of the pour. It is a rugged, ultra-precise, and environmentally conscious tool that proves sometimes, less really is more.
Pro Tip: For high-volume bars, pair the Umbra with an Acaia Pearl sitting on the bench. The Pearl can show your dose weight from the Umbra via Magic Relay, allowing you to dose and pull shots with a single, unified data point.
Acaia Espresso Scales: Choosing Between the Lunar 2021, Umbra, and Brew-by-Weight
When it comes to high-end espresso preparation, Acaia has evolved from a single iconic scale into a sophisticated ecosystem of specialized tools. Understanding the differences between the Lunar 2021, the Umbra Lunar, and the La Marzocco Brew-by-Weight (BbW) scale is key to choosing the right workflow for your bar.
1. Acaia Lunar 2021: The All-Rounder
The Lunar 2021 is the definitive standalone espresso scale. It is designed for baristas who want all their data—weight, time, and flow rate—contained in one robust, visible unit.
-
Key Feature: The Real-Time Flow-Rate Indicator. This LED bar allows you to see exactly how many grams per second are hitting the cup, helping you spot channeling instantly.
-
Best For: Enthusiasts and professionals who need a versatile scale that works on any machine and offers immediate visual feedback.
-
Hardware: USB-C charging, 30–40 hour battery life, and high-visibility LED display.
2. Acaia Umbra Lunar: The Minimalist
The Umbra is a radical departure from traditional design. It has no built-in display, appearing as a sleek, solid block of anodised aluminium. It is designed to be "felt but not seen."
-
Key Feature: Magic Relay technology. Instead of showing weight on its own body, it wirelessly beams the data to a paired Acaia Pearl S or a smartphone.
-
Best For: Minimalist coffee bars or "no-screen" drip trays. It is also more energy-efficient and durable because it lacks the fragile glass/LED window of a traditional scale.
-
Workflow: Typically used in a "Dual Display" setup where a Pearl scale on the bench shows the weight being measured by the Umbra on the drip tray.
3. La Marzocco x Acaia: Brew-by-Weight (BbW)
This is not a standalone scale in the traditional sense; it is a connected instrument developed exclusively for the La Marzocco Linea Mini, Micra, and GS3.
-
Key Feature: Machine Integration. Unlike a standard Lunar that just tells you the weight, this scale talks directly to the La Marzocco electronics. When the scale hits your target weight (e.g., 36g), it sends a signal to the machine to automatically stop the shot.
-
Best For: Owners of La Marzocco home machines who want "set and forget" volumetric precision. It includes a "predictive drip algorithm" that accounts for the coffee still in the air after the pump stops.
-
Hardware: Identical in build to the Lunar 2021 but runs exclusive La Marzocco firmware. Note: As of 2024, standard Lunar 2021 scales can be upgraded to BbW firmware via a paid digital license from Acaia.
| Feature | Lunar 2021 | Umbra Lunar | LM Brew-by-Weight |
| Display | On-device LED | None (Requires Relay) | On-device LED |
| Stop-Shot Function | Manual | Manual | Automatic (with LM) |
| Flow-Rate Bar | Yes | Via App/Relay only | Yes |
| Charging | USB-C | USB-C | USB-C |
| Ideal User | General Pro/Home | Minimalist/Connected Bar | La Marzocco Owners |
Which one do you need?
-
Choose the Lunar 2021 if you want the best all-around scale that provides immediate, easy-to-read data for any espresso machine.
-
Choose the Umbra Lunar if you want a clean, "invisible" aesthetic on your machine and already own (or plan to own) an Acaia Pearl to act as your display.
-
Choose the Brew-by-Weight Scale if you own a La Marzocco and want the machine to handle the precision of stopping the shot for you, ensuring every espresso is identical without you watching the clock.
Acaia Umbra Lunar Support
Discover Operation Modes of Umbra Lunar: Dual Weight Display
About Acaia
Founded in 2014, Acaia was born from a simple yet ambitious mission: to merge laboratory-grade technology with beautiful, minimalist design for the specialty coffee community. The company first gained global attention with the successful Kickstarter launch of the Acaia Pearl in 2013, which set a new standard for what a coffee scale could be. Acaia believes that the future of coffee equipment lies in the seamless integration of hardware and software, a philosophy evident in their suite of Bluetooth-connected apps and firmware-upgradeable devices.
Acaia is more than just a manufacturer; it is a brand deeply rooted in quality and community. Every product is hand-built using high-quality components designed to withstand the rigours of a commercial environment while maintaining an aesthetic that elevates any coffee bar. By collaborating with manufacturers and listening to feedback from baristas worldwide, Acaia continues to push the boundaries of extraction control, transforming the ritual of brewing into a precise and repeatable science.
$61.91
Original: $176.89
-65%Acaia Umbra Lunar Weighing Scale - Magic Relay & ReacX Technology—
$176.89
$61.91Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Acaia Umbra Lunar is a revolutionary, display-free scale designed to bring a minimalist, "no-clutter" aesthetic to the professional coffee bar. Engineered with advanced Magic Relay technology, the Umbra Lunar wirelessly communicates with other Acaia devices—such as the Pearl S or Lunar—to share a screen. This allows baristas to monitor real-time measurement data on their primary display while the Umbra handles the weighing, creating a seamless, dual-device workflow that is perfect for precise portafilter dosing and commercial efficiency.
Constructed from water-resistant anodised aluminium, the Umbra is built to withstand the rigours of a busy café environment while maintaining industrial-grade accuracy. It features the cutting-edge Acaia ReacX weighing technology, ensuring unmatched repeatability and precision with every shot. Because it lacks a built-in display, the unit is exceptionally energy-efficient, offering extended battery life for sustainable, long-term use. Whether used as a standalone tool via the Acaia app or as an extension of your existing setup, the Umbra Lunar represents the next generation of smart, sustainable coffee weighing.
Acaia Umbra Lunar Scale User Manual
Acaia Umbra Lunar Scale Quick Start Guide
You get all of these Freebies when you purchase through Prime Coffee Suppliers:
-
Free! Delivery (Worth £60) 1-3 days Free Standard UK Delivery, Direct from UK Warehouse, Or 2-4 Days direct from warehouse in Milan.
- Free! 12 Months Parts Warranty
Features
Magic Relay Switching: Instantly shares weight data with a paired Acaia Pearl or Lunar display for a distraction-free bar.
Acaia ReacX Technology: Industrial-grade sensors provide the highest level of accuracy and weight repeatability available.
Energy-Efficient Design: The display-free silhouette significantly reduces power draw, ideal for eco-conscious commercial setups.
Espresso-Proof Build: Machined from durable aluminium to survive the heat, steam, and spills of a professional drip tray.
Specification of Acaia Umbra Lunar Weighing Scale
| Feature | Details |
| Connectivity | Bluetooth Low Energy 5.4 with Magic Relay |
| Material | Water-resistant Anodised Aluminium & Polycarbonate |
| Maximum Capacity | 1000g / 35.27oz |
| Readability | 0.1g (High-res mode 0.01g) |
| Battery Life | 40 – 48 Hours active / 14 Days standby |
| Charging Port | USB-C |
| Dimensions | 105mm (W) x 105mm (L) x 15mm (H) |
The Minimalist Revolution: Why the Acaia Umbra Lunar is the New Bar Standard
In the world of high-end espresso, the Acaia Umbra Lunar represents a bold shift toward minimalist design and "invisible" technology. While the classic Lunar 2021 was defined by its bright LED feedback, the Umbra reimagines the coffee bar by removing the built-in display entirely. It is not just a scale; it is an intelligent extension of a connected ecosystem, designed for baristas who value a distraction-free workspace without sacrificing an ounce of precision.
1. Magic Relay Technology
The defining feature of the Umbra series is Magic Relay. Since the scale itself has no screen, it uses Bluetooth Low Energy 5.4 to transmit weight data instantly to a paired device.
-
Why you need it: You can pair the Umbra with an Acaia Pearl S or a smartphone. When you place a cup on the Umbra, the weight appears seamlessly on your secondary device. This allows for a "dual-display" setup where one screen manages everything, keeping your espresso machine's drip tray looking clean, sleek, and uncluttered.
2. Acaia ReacX™ Industrial Precision
Hidden beneath the matte black aluminium is the new Acaia ReacX™ weighing technology. This is the most advanced sensor suite Acaia has ever produced.
-
Why you need it: ReacX technology offers industrial-grade repeatability and nearly zero latency. In a commercial environment where you are pulling hundreds of shots, the Umbra ensures the weight you see is the absolute truth, stabilizing faster than almost any other scale on the market.
3. Sustainable, Ultra-Efficient Performance
By removing the power-hungry LED display, the Umbra drastically reduces its energy footprint.
-
Why you need it: The Umbra offers a remarkable battery life of 40–48 hours of continuous use. For a busy cafe, this means fewer charging cycles and a significantly longer overall lifespan for the internal lithium-ion battery, making it the most sustainable choice in the Acaia lineup.
4. Advanced Water Resistance & Durability
The Umbra is milled from a single block of anodised aluminium. Because it lacks a display window or physical buttons, there are fewer entry points for liquid.
-
Why you need it: It is the most "espresso-proof" scale available. The display-free design makes it incredibly easy to wipe clean, and the internal components are treated to survive the steam, heat, and constant splashes inherent to commercial espresso service.
5. Boundless Connectivity
The Umbra is designed to be the "hidden brain" of your setup. Through the Acaia Brewmaster app, you can customize every parameter of your workflow.
-
Why you need it: Whether you’re using it for portafilter dosing or as a secondary scale for split-shot monitoring, the Umbra provides total flexibility. It connects effortlessly to the latest Acaia ecosystem, ensuring your coffee bar remains at the cutting edge of brewing technology.
The Verdict: Is it worth it?
The Acaia Umbra Lunar is for the barista who wants the data of a laboratory with the aesthetic of a high-end design studio. It eliminates the visual noise of multiple blinking screens, allowing you to focus entirely on the craft of the pour. It is a rugged, ultra-precise, and environmentally conscious tool that proves sometimes, less really is more.
Pro Tip: For high-volume bars, pair the Umbra with an Acaia Pearl sitting on the bench. The Pearl can show your dose weight from the Umbra via Magic Relay, allowing you to dose and pull shots with a single, unified data point.
Acaia Espresso Scales: Choosing Between the Lunar 2021, Umbra, and Brew-by-Weight
When it comes to high-end espresso preparation, Acaia has evolved from a single iconic scale into a sophisticated ecosystem of specialized tools. Understanding the differences between the Lunar 2021, the Umbra Lunar, and the La Marzocco Brew-by-Weight (BbW) scale is key to choosing the right workflow for your bar.
1. Acaia Lunar 2021: The All-Rounder
The Lunar 2021 is the definitive standalone espresso scale. It is designed for baristas who want all their data—weight, time, and flow rate—contained in one robust, visible unit.
-
Key Feature: The Real-Time Flow-Rate Indicator. This LED bar allows you to see exactly how many grams per second are hitting the cup, helping you spot channeling instantly.
-
Best For: Enthusiasts and professionals who need a versatile scale that works on any machine and offers immediate visual feedback.
-
Hardware: USB-C charging, 30–40 hour battery life, and high-visibility LED display.
2. Acaia Umbra Lunar: The Minimalist
The Umbra is a radical departure from traditional design. It has no built-in display, appearing as a sleek, solid block of anodised aluminium. It is designed to be "felt but not seen."
-
Key Feature: Magic Relay technology. Instead of showing weight on its own body, it wirelessly beams the data to a paired Acaia Pearl S or a smartphone.
-
Best For: Minimalist coffee bars or "no-screen" drip trays. It is also more energy-efficient and durable because it lacks the fragile glass/LED window of a traditional scale.
-
Workflow: Typically used in a "Dual Display" setup where a Pearl scale on the bench shows the weight being measured by the Umbra on the drip tray.
3. La Marzocco x Acaia: Brew-by-Weight (BbW)
This is not a standalone scale in the traditional sense; it is a connected instrument developed exclusively for the La Marzocco Linea Mini, Micra, and GS3.
-
Key Feature: Machine Integration. Unlike a standard Lunar that just tells you the weight, this scale talks directly to the La Marzocco electronics. When the scale hits your target weight (e.g., 36g), it sends a signal to the machine to automatically stop the shot.
-
Best For: Owners of La Marzocco home machines who want "set and forget" volumetric precision. It includes a "predictive drip algorithm" that accounts for the coffee still in the air after the pump stops.
-
Hardware: Identical in build to the Lunar 2021 but runs exclusive La Marzocco firmware. Note: As of 2024, standard Lunar 2021 scales can be upgraded to BbW firmware via a paid digital license from Acaia.
| Feature | Lunar 2021 | Umbra Lunar | LM Brew-by-Weight |
| Display | On-device LED | None (Requires Relay) | On-device LED |
| Stop-Shot Function | Manual | Manual | Automatic (with LM) |
| Flow-Rate Bar | Yes | Via App/Relay only | Yes |
| Charging | USB-C | USB-C | USB-C |
| Ideal User | General Pro/Home | Minimalist/Connected Bar | La Marzocco Owners |
Which one do you need?
-
Choose the Lunar 2021 if you want the best all-around scale that provides immediate, easy-to-read data for any espresso machine.
-
Choose the Umbra Lunar if you want a clean, "invisible" aesthetic on your machine and already own (or plan to own) an Acaia Pearl to act as your display.
-
Choose the Brew-by-Weight Scale if you own a La Marzocco and want the machine to handle the precision of stopping the shot for you, ensuring every espresso is identical without you watching the clock.
Acaia Umbra Lunar Support
Discover Operation Modes of Umbra Lunar: Dual Weight Display
About Acaia
Founded in 2014, Acaia was born from a simple yet ambitious mission: to merge laboratory-grade technology with beautiful, minimalist design for the specialty coffee community. The company first gained global attention with the successful Kickstarter launch of the Acaia Pearl in 2013, which set a new standard for what a coffee scale could be. Acaia believes that the future of coffee equipment lies in the seamless integration of hardware and software, a philosophy evident in their suite of Bluetooth-connected apps and firmware-upgradeable devices.
Acaia is more than just a manufacturer; it is a brand deeply rooted in quality and community. Every product is hand-built using high-quality components designed to withstand the rigours of a commercial environment while maintaining an aesthetic that elevates any coffee bar. By collaborating with manufacturers and listening to feedback from baristas worldwide, Acaia continues to push the boundaries of extraction control, transforming the ritual of brewing into a precise and repeatable science.
