Sunmatched
ShopPioneer batch · Final prices, no VAT

Two models.One light.

Swiss made

Identical outside: same case, same solar cell, same radio, same app. Choose by what you measure.

In stock · ships in 1–3 working days
StandardSHT40 · ±0.2 °C
The Climate: a 50 mm square, iron-grey sensor with a dark solar cell, seen at three quarters

Climate

CHF 79

Temperature and humidity. Runs on room light.

  • Temperature±0.2 °C · SHT40
  • Humidity±1.8 %RH
  • Barometric pressure–
  • Deriveddew point · abs. humidity · comfort
In stock · ships in 1–3 working days30-day returns · 2-year warranty
Product safety & manufacturer

Manufacturer: Dunkel Engineering, Weiermattweg 30, 4452 Itingen, Switzerland · info@dunkel-engineering.ch

Product: Sunmatched Climate (type Climate), Sunmatched Climate Pro (type Climate Pro); serial number on the label of each unit.

Safety: indoor use only; do not open; keep away from small children; no heat above 60 °C; charge only from a standard 5 V USB-C supply. All warnings and disposal

ProSHT45 · BMP581 · ±0.1 °C
The Climate Pro from the side, USB-C port and vents: same case, same solar cell

Climate Pro

CHF 99

Lab-grade humidity, temperature and barometric pressure.

  • Temperature±0.1 °C · SHT45
  • Humidity±1.0 %RH
  • Barometric pressure±0.06 hPa rel. · BMP581
  • Derived+ pressure trend (weather)
In stock · ships in 1–3 working days30-day returns · 2-year warranty
Product safety & manufacturer

Manufacturer: Dunkel Engineering, Weiermattweg 30, 4452 Itingen, Switzerland · info@dunkel-engineering.ch

Product: Sunmatched Climate (type Climate), Sunmatched Climate Pro (type Climate Pro); serial number on the label of each unit.

Safety: indoor use only; do not open; keep away from small children; no heat above 60 °C; charge only from a standard 5 V USB-C supply. All warnings and disposal

Snow-capped Bernese Oberland peaks glowing pink and gold above deep blue ridges
Bernese Oberland · alpenglow
01

Volume discount

On the whole order · any mix of models

One for every room.

The discount counts every unit in your cart, Climate and Climate Pro together. Units above the stock are built to order and ship in 2–4 weeks: the checkout tells you before you pay.

3units

−10 %

Trio · on the whole order, any mix
3 × Climate–
3 × Climate Pro–
Per unit– · –

5units

−15 %

Home · on the whole order, any mix
5 × Climate–
5 × Climate Pro–
Per unit– · –

10units

−20 %

House · on the whole order, any mix
10 × Climate–
10 × Climate Pro–
Per unit– · –
Product safety & manufacturer

Manufacturer: Dunkel Engineering, Weiermattweg 30, 4452 Itingen, Switzerland · info@dunkel-engineering.ch

Product: Sunmatched Climate (type Climate), Sunmatched Climate Pro (type Climate Pro); serial number on the label of each unit.

Safety: indoor use only; do not open; keep away from small children; no heat above 60 °C; charge only from a standard 5 V USB-C supply. All warnings and disposal

20, 50 or more? Yes: up to 50 of each model per order, and the House tier applies from 10. Shops and installers: apply as a dealer.

02

Compare

Typical values · measured every 60 s

Every number, side by side.

1 Implemented to the specifications; certification pending. All accuracies typical. Weight to be confirmed.
SpecificationClimateCHF 79Climate ProCHF 99
Measurement
Temperature±0.2 °CSensirion SHT40, typ.±0.1 °CSensirion SHT45, typ.
Relative humidity±1.8 %RHtyp.±1.0 %RHtyp.
Barometric pressure–±0.06 hParelative · ±0.3 hPa absolute · Bosch BMP581
Derived valuesDew point, absolute humidity, comfort zoneSame, plus pressure trend (weather)
IntervalEvery 60 s (configurable)same
History on the sensor7 days, fills gaps when your phone or server was awaysame
Power
Average power≈ 15–20 µW, depending on modesame
Light it needs≈ 8½ h of 200 lx room light per daysame
In complete darkness≈ 4 weeks from a full store (26–27 days)same
Energy storeLithium-ion capacitor, no battery, > 50,000 cyclessame
Solar cellIndoor solar cell for artificial and diffuse lightsame
Top-upUSB-C, 5 Vsame
Connectivity
RadioBluetooth Low Energy 6 · IEEE 802.15.4: Zigbee 3.0, Thread (Matter beta)1same
ModesBTHome (default), Zigbee 3.0 or Thread (Matter beta), switched in the appsame
Radio chipNordic Semiconductor nRF54L15same
SecurityOwn Bluetooth passkey per unit · signed OTA updates with rollbacksame
Cloud, accountNone. Local onlysame
Hardware
Size50 × 50 × 7.8 mmsame
Weight≈ 18 gsame
CaseUV-stable ASA, iron grey, fine pebble texturesame
InterfaceRGB status LED and a buttonsame
MountingRemovable adhesive stripsame
OriginSwiss made · Itingen, Switzerlandsame
Warranty2 years · 30-day returnssame
03

In the box

Sensor · strip · card

What you get.

  1. The sensorserial-numbered
  2. A removable adhesive stripwall · frame · shelf
  3. A quick-start cardfirst steps
  4. USB-C cablenot included
The sensor mounted on a wall with its adhesive strip, in soft room light
04

Delivery and payment

Swiss Post · no customs

From Itingen to your door.

We ship to Switzerland and Liechtenstein with Swiss Post, straight from the workshop: no customs, no middlemen. Shipping is calculated at checkout from the real postage. Outside Switzerland? Tell us, and we let you know when we ship to your country.

In stock1–3 working days

By Swiss Post, with tracking by default.

Above the stockBuilt to order · 2–4 weeks

The checkout shows the lead time before you pay.

Returns · warranty30 days · 2 years

Send it back within 30 days, no reason needed.

Payment
CardsApple PayGoogle PayTWINTBank transfer

Secure payment page by Stripe, or bank transfer with a QR-bill. Final prices, no VAT.

Shipping and payment · Returns · Warranty

05

Before you order

Pioneer batch

Early, not unfinished.

01

It’s a first batch: what does that mean for me?

Final hardware, firmware that keeps getting better over the air, and a direct line to the engineers.

02

How fast do you ship, and are there customs?

In stock: 1–3 working days by Swiss Post. We ship to Switzerland and Liechtenstein, so there are no customs.

03

What about returns and warranty?

30-day returns, no reason needed, and a 2-year warranty.

04

Can I order 20 or 50?

Yes. Volume tiers apply to the whole order; above the stock we build to order in 2–4 weeks.

05

What happens in winter or in the dark?

A full energy store lasts about 4 weeks in complete darkness. A dark corner may need a USB-C top-up now and then.

06

Which smart-home systems does it work with?

Home Assistant via BTHome (default), Zigbee 3.0 coordinators such as ZHA and Zigbee2MQTT, and Thread with Matter as a beta.

All 16 answers, setup guides and downloads.Support
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