# Outdoor Bimetallic Thermometer Terdens 990 — window/wall mount, analog temperature gauge

**URL:** https://aio.lv/en/product--terdens-990--12044890
**Data updated:** 2026-03-12 19:27 (EET)
**Category:** Weather Station
**Manufacturer:** Terdens
**Manufacturer code:** 990
**EAN:** 5901733000990
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--terdens-990--12044890

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Terdens 990 is an outdoor bimetallic thermometer designed for window- or wall-mounted installation. The analog temperature gauge uses a bimetallic element to measure ambient outdoor temperature, providing a simple, power-free display suitable for homes, balconies, greenhouses or sheds. Easy to mount and read, it offers durable mechanical measurement without electronic components.

## Long description

Terdens 990 is an outdoor bimetallic thermometer designed for window or wall mounting. The analog temperature gauge uses a bimetallic sensing element to indicate ambient outdoor temperature without requiring power or electronic components. Its mechanical construction provides a straightforward, low-maintenance way to monitor outdoor conditions at homes, balconies, greenhouses and sheds.
Advantages
The thermometer delivers continuous, passive temperature measurement with a clear analog dial that is easy to read at a glance. Its bimetallic mechanism is mechanically robust and not dependent on batteries or calibration software, reducing upkeep. The housing and mounting options allow secure installation on windows or walls, and the simple design tolerates typical outdoor exposure when installed in a sheltered location.
Suitable for
Residential outdoor temperature monitoring on balconies and patios
Greenhouses and cold frames where a simple temperature reference is needed
Sheds, garages and workshops for basic ambient temperature awareness
Window mounting to view outside temperature from indoors
Key specifications
Measurement principle: bimetallic sensing element providing mechanical temperature indication
Display type: analog dial with pointer
Mounting options: designed for window or wall installation
Power: passive, no batteries or external power required
Intended use: outdoor ambient temperature measurement
How to use
Mount the device according to the chosen installation method: attach to a window frame or fix to an exterior wall at eye level for easiest reading. Avoid direct exposure to driving rain or direct sunlight that can cause localized heating and affect the reading; a sheltered position is preferable. Read the temperature on the analog dial pointer; the bimetallic element responds to ambient temperature changes and moves the pointer accordingly. No electrical connections or regular battery replacement are required; occasional cleaning of the housing and dial face will help maintain legibility.
Usage recommendations
For reliable readings, install the thermometer in a shaded, ventilated spot away from heat sources such as vents, heaters or reflected sunlight from windows or metal surfaces. Periodically check the mounting for security and clean the dial face gently to ensure clear visibility.

## FAQ

### How much does the Outdoor Bimetallic Thermometer Terdens 990 cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 02.07.2026 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 Terdens 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 Terdens 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

## Image

https://aio.lv/img/cache/product/12044890/67531546_large.webp