# Reed Switch Door Contact KN-D4 by No name — KN-D4 magnetic door sensor

**URL:** https://aio.lv/en/product--no-name-kn-d4--11959802
**Data updated:** 2026-03-11 13:59 (EET)
**Category:** Smart Sensors
**Manufacturer:** No name
**Manufacturer code:** KN-D4
**EAN:** 5902887019470
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--no-name-kn-d4--11959802

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

KN-D4 is a door reed switch (magnetic contact) by No name, model KN-D4. It is a normally-open/normally-closed magnetic door contact used for detecting door or window opening in alarm and security systems. The compact sensor is intended for mounting on frames and sashes to provide reliable open/close state detection and integration with control panels.

## Long description

The KN-D4 reed switch door contact by No name is a compact magnetic sensor designed for detection of door and window open/close states in alarm and security systems. The device implements a reed switch arrangement with normally-open and normally-closed operation options, allowing straightforward integration with a wide range of control panels. Its small size enables mounting on door and window frames and sashes where it provides reliable state change signaling for intrusion detection and access monitoring.
Advantages
The KN-D4 offers a simple mechanical design that provides dependable contact switching and low power consumption. Its compact form factor allows installation in tight profiles and on different types of frames without significant visual impact. The magnetic operation ensures silent switching and minimal mechanical wear, supporting long-term reliability in typical residential or light-commercial security installations.
Suitable for
 Wired alarm and security control panels
 Door and window open/close state monitoring
 Perimeter intrusion detection in homes and small offices
 Integration into access control systems for basic door status sensing
Key specifications
 Operating principle: magnetic reed switch with NO/NC configurations
 Mounting: surface mount on frame and sash
 Form factor: compact inline sensor and magnet components suitable for standard door and window installations
 Connection: wired contact terminals for integration with alarm panels
 Switching type: mechanical reed contact actuated by a magnet
How to use
Position the sensor and magnet so that they align when the door or window is closed, maintaining the recommended gap specified by the installer’s guide. Secure each component to the frame and sash using appropriate screws or adhesive pads compatible with the mounting surfaces. Connect the sensor’s wired terminals to the alarm or control panel input, observing correct NO/NC configuration required by the system. After installation, test the sensor by opening and closing the door or window to verify that the control panel registers state changes correctly.
Usage recommendations
Install the KN-D4 away from large ferrous metal obstructions and strong electromagnetic sources that could affect magnetic operation. Use correct wiring and terminal connections to match the control panel’s input type (normally-open or normally-closed). Periodically check mounting integrity and contact alignment to ensure consistent performance.

## FAQ

### How much does the Door Reed Switch No name KN-D4 cost, and is it available for purchase?

The price is 15.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 40 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 03.07.2026 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 No name 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 No name 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/11959802/67405208_large.webp