tink Basics Matter Smart Radiator Thermostat

Buy the pack, not the single

The tink Basics thermostat makes most sense when several radiators need a Matter valve at once. tink sells it singly, in threes and in sixes, and the price per valve falls steeply: about €40 for one before delivery, about €27 a valve in the three-pack and about €23 in the six-pack, which ships free. At the current offer, three tink valves cost about what one Eve Thermo does.

tink shows those prices as cuts of half or more from recommended prices it sets for its own brand, so the discount says little. The pack price itself is what matters, and tink can change it. A single valve with delivery comes to about €45, which is a much weaker bargain. Buy one on its own only to check the fit on an awkward radiator and the pairing with your platform before ordering a pack; tink takes returns free within 14 days.

Your platform does the planning

There is no tink app or hub. The thermostat joins Apple Home, Google Home, Alexa or SmartThings directly over Matter. tink advertises day and week schedules and a holiday mode, but says the schedules and automations you can use depend on the platform. That suits a household that already runs everything from one of those apps and wants each radiator to behave like any other device there. It suits less well someone who wants a dedicated heating app, and that is where Eve Thermo, with schedules stored in the valve, earns its higher price. tink does not list Home Assistant or Homey.

Matter over Thread also means a Thread border router has to reach the room. tink gives the HomePod mini, Apple TV 4K and Echo Hub as examples. Without one, you have a manual valve with buttons.

Set realistic expectations for open windows. The valve turns the heat down when it sees a sudden temperature drop, and tink itself says a contact sensor is quicker and more reliable. tink's door and window sensor reports an opening straight away, but you have to link it to the valve with an automation in your platform. tink sells one thermostat with one sensor, and three thermostats with two sensors, for households that want that from the start.

The specifications match Eurotronic's Comet Zero Matter

tink says the thermostat is made in Germany but does not name the maker. Its specification table repeats Eurotronic's December 2025 datasheet for the Comet Zero Matter line for line, including the 62 × 68 × 82 mm body, 162 g weight, valve force above 100 N and +4 dBm radio. Eurotronic's newer documents list a +8 dBm radio. Eurotronic is a German radiator-thermostat maker, and its Comet Zero Matter has been Matter-certified since May 2025.

The match is worth knowing because tink's name is not on a Matter certification listing for this thermostat, although tink's door and window sensor, motion sensor, plug and bulbs are listed. tink also does not state a Matter version, and its product page offers no manual to download. Identical specifications suggest a shared design, but they do not show that the tink unit carries Eurotronic's certification. For now, platform support rests on tink's word. Eurotronic's certified version has a recommended price of about €30, but Reichelt and some other shops have stopped listing it.

Fitting and everyday use

The thermostat screws onto M30 × 1.5 valves, the common European fitting, and tink includes adapters for Danfoss RA, RAV and RAVL valves. Other valve bodies need an adapter bought separately. It replaces the thermostatic head, not the valve, so a tenant can keep the old head and refit it when moving out.

Two AA batteries power it, and tink estimates about two years between changes. Plus and minus buttons and a small display handle quick adjustments at the radiator, and a child lock, frost protection and a routine that moves the valve to stop it seizing are built in.

Who should buy it

Buy the three-pack or six-pack for a flat or house in Germany or Austria with a Thread border router already in place, where simple routines in Apple Home, Google Home, Alexa or SmartThings are enough. Choose Eve Thermo when you want a dedicated app that keeps schedules running from the valve itself. Tado Smart Radiator Thermostat X costs more per valve but brings a rechargeable battery, a physical dial and optional boiler coordination. Bosch's Radiator Thermostat II makes sense in a Bosch Smart Home system. If a published Matter certification is a requirement, wait for tink to list this model, or look for Eurotronic's certified Comet Zero Matter where it is still sold.