Subminimal Flux WDT – electric WDT tool for a loose, level coffee bed
Buy the Subminimal Flux in Switzerland: electric WDT tool with 0.35 mm needles, 600 or 800 RPM for loosening and 350 RPM for levelling, battery with USB-C.
As long as you hold the button, the Flux loosens the grounds quickly. When you let go, it keeps running slowly for about four seconds and levels the coffee bed. It is stored lying on its tray or upright on the wall magnet, in Black, White or Terracotta.
The Flux is the electric WDT tool from Subminimal in Singapore. WDT stands for Weiss Distribution Technique: fine needles loosen the grounds and distribute them evenly in the basket. Subminimal has turned this into a routine that needs just a single button. We are the official Swiss importer of Subminimal.
At a glance
| Fast speed |
600 or 800 RPM, switchable, runs as long as the button is held |
| Slow speed |
350 RPM, starts on release and runs for about 4 seconds |
| Operation |
touch button on top of the device |
| Needles |
0.35 mm, under a magnetic cap, can be fitted straight or fanned out, the same as on the Flick |
| Battery |
lithium-ion 3.7 V (type 14280), replaceable |
| Charging |
USB-C, 5 V, only with a dry port |
| Device dimensions |
90 × 21 mm, with needles approx. 140 × 21 mm |
| Tray dimensions |
160 × 64 × 15 mm |
| Wall magnet dimensions |
42 × 14 × 16 mm |
| Cleaning |
wipe with a slightly damp cloth, do not rinse or immerse |
| What's included |
Flux WDT, second set of needles, tray, stick-on wall magnet, certificate of authenticity, instructions |
| Charging cable |
not listed in Subminimal's packing list |
| Colours |
Black, White, Terracotta |
| Manufacturer |
Subminimal, Singapore |
Features of the Flux
Loosen fast, level slowly
As long as you hold the touch button on top, the Flux spins fast, at 600 or 800 RPM. As soon as you let go, it switches to 350 RPM on its own and keeps running slowly for about four seconds. According to Subminimal, the fast phase breaks up the clumps and the slow phase levels the coffee bed. Evenly distributed grounds are meant to reduce channeling and make your shots more consistent.
Needles straight or fanned out
The needles are 0.35 mm thin and sit under a magnetic cap. Pull off the cap and you can take them out, swap them or realign them. From the factory they stand parallel and draw tight circles. If you bend them slightly outwards before inserting them, they fan out and cover more of the basket. A second set of needles is included, and they are the same needles as on the Subminimal Flick from our Subminimal collection.
Two fast settings to choose from
Whether the fast phase runs at 600 or 800 RPM is up to you. With the Flux at rest, tap the button five times and hold it down on the fifth tap. After a few seconds the setting changes, and when you let go it is saved.
USB-C charging, replaceable battery
It charges via USB-C at 5 V, and only when the port is dry. Subminimal deliberately made the 3.7 V lithium-ion battery replaceable. Subminimal explains how to swap it step by step in its instructions.
The details in everyday use
Storage on the wall magnet or on the tray
The Flux comes with a tray and a stick-on wall magnet. Lying on the tray or upright on the wall next to the machine: it has its own spot, and the needles don't lie loose on the counter.
Cleaning with a damp cloth
The Flux is not waterproof. Do not hold it under the tap and do not immerse it. Wipe the body and needles with a slightly damp cloth.
Safe in the hand
The needles are sharp. Keep the Flux out of the reach of children and keep fingers and hair away from the rotating head. According to Subminimal, it is intended for household use.
Espresso by taste, not by the clock
An even coffee bed is not an end in itself. In our experience, a change to the grind size or the dose shows up more clearly in the cup with it. We grind fine, start at 14.5 g and work our way up with the dose, usually to 17 g, at a ratio below 1:2 and always by weight. If an espresso lacks body, in our experience a little more coffee often helps. A higher brewing temperature tends to bring more body, a lower one more aroma.
There are no espresso police. The Flux takes one step off your hands and makes it the same every morning. What tastes good in the cup afterwards is your call. Our opinion is one of many.
Who the Flux is for
A good fit if your morning starts with a portafilter and you no longer want to stir the grounds by hand. A good fit if you like single dosing and look for the same calm ritual every time. And a good fit if you are looking for a WDT tool in colour: Black, White or Terracotta.
Our puck prep workshop shows how WDT, puck screen and tamper work together, and the article WDT and self-levelling tampers explains the background. If you are still looking for a machine or grinder, our advice tool can help. And if a question remains open: Jackson, our AI advisor, helps you around the clock.
What goes with it
After distributing comes the tamper. For anyone who wants tampers and puck screens that are affordable and precise: the Normcore collection. If you want more: Weber Workshops. You will find all tampers in the tamper collection, and puck screens among the puck screens.
For weighing: for anyone who wants scales that are affordable and precise: Normcore. If you want an app and a flow rate display: Acaia. You will find the Subscale dosing cup with weighing function in the Subminimal collection. For a different hole pattern in the basket, take a look at the precision baskets and filter baskets and at our basket finder. More distribution tools are among the WDT tools, and the brand's full range is in the Subminimal collection. Nobody needs the more expensive option, you want it, or you don't.
Buy the Subminimal Flux in Switzerland
You order the Flux directly online. We deliver within 2–5 working days throughout Switzerland and to Liechtenstein, and Click & Collect is available in Bern and Zurich. We answer questions at [email protected].
Frequently asked questions about the Subminimal Flux
What is the difference between the Flux and the Flick?
Both are WDT tools from Subminimal and use the same 0.35 mm needles. The Flux has a motor with a battery: hold the button and it spins fast at 600 or 800 RPM, then slowly at 350 RPM for about four seconds after you let go. It also comes with a tray and a wall magnet for storage.
How do I switch the fast setting between 600 and 800 RPM?
With the Flux at rest, tap the touch button five times and hold it down on the fifth tap. After a few seconds the setting changes. When you let go, the new setting is saved.
Can I rinse the Flux under water?
No. The Flux is not waterproof. Wipe the body and needles with a slightly damp cloth and only charge it when the USB-C port is dry.
The Flux doesn't spin or doesn't charge – what can I do?
Charge it via USB-C at 5 V and make sure the port is dry. The battery can be replaced, and Subminimal describes the procedure in its instructions. If that doesn't help, get in touch via Service & Repair and we will look into it together.
My espresso runs unevenly or spurts – is it the distribution?
Sometimes, but not only. Unevenly distributed grounds are one of several causes, and grind size, dose and tamper play a part too. You will find the most common causes and what helps in the first aid for espresso machines, and in the puck prep simulator you can see how channeling develops. And Jackson, our AI advisor, goes through the points with you.
Can I see the Subminimal Flux in person before buying?
That depends on whether the Flux is currently on display. In our showrooms in Bern (Gerberngasse 44) and Zurich Oerlikon (Hagenholzstrasse 50b) we show a large selection, but not the entire range – it is too big for that, and the display changes. Send us a short message to [email protected] before your visit, and we will check for you whether the Flux is currently there.
Tip from the roastery: In our roastery in Zurich we like to roast for espresso towards body and sweetness. Cozy Chocolate and Nutty Delight bring chocolate and nut to the cup, Very Nutty plenty of body without acidity. With light roasts like Wild Peach, in our experience it shows especially clearly what an even coffee bed makes possible. You will find all beans under coffee beans. That is our recommendation, one of many.
