# F&F K400 Temperature Sensor for CRT-015T Controllers

**URL:** https://aio.lv/en/product--ff-sonda-k400--12456157
**Data updated:** 2026-05-18 09:43 (EEST)
**Category:** Smart Sensors
**Manufacturer:** FF
**Manufacturer code:** SONDA K400
**EAN:** 5908312594314
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 28.92 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-sonda-k400--12456157

## 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

The F&F K400 is a dedicated temperature sensor designed for use with the CRT-015T temperature controller. This precision sensor ensures accurate thermal monitoring and reliable operation within heating or cooling systems. It is an essential component for maintaining precise temperature control in industrial or domestic automation applications, offering seamless compatibility and easy installation with the specified controller model.

## Long description

The F&F K400 temperature sensor is a high-precision component specifically engineered for seamless integration with the CRT-015T temperature controller. This sensor provides reliable thermal data, enabling the controller to maintain optimal temperature levels in various heating and cooling environments. Its robust design ensures consistent performance, making it a dependable choice for both residential and industrial automation systems that require accurate environmental monitoring.
Advantages
The primary advantage of the F&F K400 is its perfect compatibility with the CRT-015T controller, which eliminates the need for complex calibration or configuration. By utilizing this dedicated sensor, users benefit from highly accurate temperature readings that contribute to the overall efficiency and stability of their thermal management systems. The durable construction of the sensor allows for reliable operation over extended periods, reducing the need for frequent maintenance or replacement.
Suitable for
Heating system temperature monitoring
Cooling and refrigeration control
Industrial automation processes
Domestic climate control systems
This sensor is not intended for use with controllers other than the specified CRT-015T model. It is also not suitable for environments involving extreme chemical exposure or high-pressure conditions that exceed the physical limitations of the sensor housing.
Key specifications
Compatible with: CRT-015T temperature controller
Application: Thermal monitoring for heating and cooling
Design: Dedicated sensor probe
To use the F&F K400, simply connect the sensor leads to the designated input terminals on the CRT-015T controller. Ensure that the connection is secure and that the sensor probe is positioned in the area where temperature monitoring is required. Once connected, the controller will automatically recognize the sensor and begin processing thermal data for system regulation.
What to consider before purchase
Verify that your controller model is the CRT-015T
Ensure the cable length is sufficient for your installation site
Check that the operating environment is compatible with the sensor specifications
For optimal accuracy, ensure the sensor probe is placed away from direct heat sources or drafts that could interfere with ambient temperature readings. Regularly inspect the connection points to ensure they remain clean and secure.

## FAQ

### How much does the F&F K400 Temperature Sensor for CRT-015T cost, and is it available for purchase?

The price is 34.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 FF 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 FF 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/12456157/68758387_large.webp