# Electronic environment thermometer TFA 30.3139 — indoor digital, -30–60°C / -22–140°F, AAA battery

**URL:** https://aio.lv/en/product--tfa-303139--10685492
**Data updated:** 2026-03-07 17:58 (EET)
**Category:** Weather Station
**Manufacturer:** TFA
**Manufacturer code:** 30.3139
**EAN:** 4009816014597
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 14.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tfa-303139--10685492

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

TFA-Dostmann 30.3139 is an electronic indoor environment thermometer with a digital display for temperature in °C and °F. It measures from -30 to 60 °C (-22 to 140 °F) and is powered by a single AAA 1.5 V battery. Compact and wall- or table-mountable, it fits home and office use for monitoring room temperature and climate control.

## Long description

TFA 30.3139 is a compact electronic indoor thermometer designed to display ambient temperature in either °C or °F. The device measures a wide range from -30 to 60 °C (-22 to 140 °F) and presents readings on a clear digital screen. Its slim housing allows for wall mounting or free-standing placement on a table or shelf, making it suitable for homes, offices and other indoor spaces that require reliable temperature monitoring. The thermometer is battery powered and compatible with standard AAA batteries for simple replacement.
Advantages
The thermometer offers a broad measurement range and dual-scale display for international use. Its compact size and light weight enable flexible placement, while the digital readout provides fast, easy-to-read temperature values. Low power consumption ensures extended battery life, and the device is compatible with widely available AAA batteries for convenient servicing.
Suitable for
 Monitoring room temperature in living rooms, bedrooms and nurseries
 Office and workplace climate control
 Indoor hobby rooms, greenhouses and storage areas with moderate conditions
 Complementing heating and cooling systems for performance checks
Key specifications
 Measurement range: -30 °C to 60 °C (−22 °F to 140 °F)
 Display: digital readout with °C and °F options
 Power supply: AAA 1.5 V battery operation
 Mounting: wall-mountable or table-top placement
 Design: compact, lightweight housing for indoor use
How to use
Install a fresh AAA 1.5 V battery into the battery compartment following the polarity markings. Select the preferred temperature scale (°C or °F) if a scale selector is provided, then place the thermometer on a flat surface or mount it on a wall away from direct sunlight, heat sources and drafts. Allow the device a few minutes to stabilise after placement to obtain an accurate ambient temperature reading. Replace the battery when the display becomes faint or when readings become unstable.
Usage recommendations
Position the thermometer at typical room height and away from windows, radiators and kitchen appliances to ensure representative ambient readings. For long-term monitoring, check battery condition periodically and avoid exposure to excessive humidity or condensation which can affect electronic components.

## Specifications

| Feature | Value |
|---|---|
| Type | Electronic environment thermometer |
| Number of batteries supported | 2 |
| Purpose | Indoor |
| Temperature measurement range | -30 - 60 |
| Placement | Table, Wall |
| Temperature measurement range | -22 - 140 |
| Display form factor | Square |

### Power

| Feature | Value |
|---|---|
| Battery type | AAA |
| Power source | Battery |
| Battery voltage | 1.5 V |

### Display

| Feature | Value |
|---|---|
| Display type | Digital |

### Packaging content

| Feature | Value |
|---|---|
| Batteries included | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.063 kg |
| Height | 96 mm |
| Width | 61 mm |
| Depth | 30 mm |

### Features

| Feature | Value |
|---|---|
| Product colour | Grey |
| Housing material | Plastic |
| Temperature measurement units | °C, F |

## FAQ

### How much does the TFA 30.3139 electronic indoor thermometer cost, and is it available for purchase?

The price is 17.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 08.07.2026 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, Bank cards on-line, Apple Pay, Google Pay. 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 TFA 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 TFA 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: weight, temperature measurement units, product colour, 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.

## Image

https://aio.lv/img/cache/product/10685492/59735667_large.webp