# Indoor Temperature & Humidity Sensor TFA-Dostmann 30.5054.02 Freestanding Wireless

**URL:** https://aio.lv/en/product--dostmann-electronic-30505402--10621664
**Data updated:** 2026-01-07 09:59 (EET)
**Category:** Smart Sensors
**Manufacturer:** dostmann electronic
**Manufacturer code:** 30.5054.02
**EAN:** 4009816037183
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 38.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 31.81 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dostmann-electronic-30505402--10621664

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.99 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

The TFA-Dostmann 30.5054.02 is a freestanding indoor temperature and humidity sensor. It operates on a 3V battery and measures 75mm in width and height with a depth of 13mm. Ideal for monitoring indoor climate conditions.

## Long description

The TFA-Dostmann 30.5054.02 Indoor Temperature & Humidity Sensor is a compact freestanding device for monitoring room climate. It displays current temperature and relative humidity on a high-contrast e-ink display that is easy on the eyes and readable without glare. The display can show black text on white or an inverted white-on-black view. The device records and shows minimum and maximum values and also includes a clock with date or weekday indication. Its slim housing and multiple mounting options — fold-out stand, adhesive wall mount, nail hanging or rear magnet for metal surfaces — make it easy to place anywhere in the home.
Advantages
The e-ink display provides paper-like contrast and low power consumption, ensuring long battery life for the 3V battery operation. A smiley indicator signals when temperature and humidity are within the comfort zone, enabling quick assessment at a glance. Stored min/max readings can be viewed with a button press, and the integrated clock offers date or weekday display. Multiple mounting options offer flexible placement on shelves, walls or metal surfaces.
Suitable for
Monitoring indoor climate in living rooms and bedrooms
Checking humidity levels in kitchens and bathrooms
Placement in offices and small commercial spaces
Use near metal appliances or on walls for continuous monitoring
Key specifications
Brand: dostmann electronic
Model / MPN: 30.5054.02
EAN: 4009816037183
Power supply: 3V battery
Dimensions: 75 mm × 75 mm × 13 mm (W × H × D)
Display: high-contrast e-ink, invertible (black-on-white or white-on-black)
Functions: temperature and relative humidity measurement, min/max memory, smiley comfort indicator, clock with date/weekday
How to use
Place the sensor on a flat surface using the fold-out stand, attach it to a wall with the supplied adhesive mount or hang it on a nail. For metal surfaces, fix the device using the rear magnet. The display shows current temperature and humidity immediately; press the button to view stored minimum and maximum readings. Use the display inversion option to select the preferred contrast mode and set the clock to show date or weekday if required. Replace the 3V battery when the display or functions indicate low power.
Usage recommendations
Position the sensor away from direct sunlight, heaters or windows with drafts to ensure accurate indoor temperature and humidity readings. Check min/max values after periods of heating or ventilation to evaluate climate changes and adjust ventilation or heating accordingly.

## Specifications

| Feature | Value |
|---|---|
| Display | LCD |
| Material | Plastic |
| Sensor type | Temperature & humidity sensor |
| Purpose | Indoor |
| Battery voltage | 3 V |
| Temperature measuring range | -9.9 - 50 |
| Humidity measuring range | 1 - 99 |

### Features

| Feature | Value |
|---|---|
| Type | Freestanding |
| Connectivity technology | Wireless |
| Built-in display | Yes |

### Power

| Feature | Value |
|---|---|
| Number of batteries supported | 2 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.06 kg |
| Height | 75 mm |
| Width | 75 mm |
| Depth | 13 mm |

## FAQ

### How much does the Indoor Temperature & Humidity Sensor TFA-Dostmann 30.5054.02 cost, and is it available for purchase?

The price is 38.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All dostmann electronic products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized dostmann electronic service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connectivity technology, type, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Indoor Temperature & Humidity Sensor TFA-Dostmann 30.5054.02?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/10621664/64415042_large.webp