# Door contact sensor BLOW 4926# (reed switch) — magnetic door/window sensor, normally closed

**URL:** https://aio.lv/en/product--blow-4926--11863367
**Data updated:** 2026-03-09 17:40 (EET)
**Category:** Smart Sensors
**Manufacturer:** BLOW
**Manufacturer code:** 4926#
**EAN:** 5900804099055
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blow-4926--11863367

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

BLOW 4926# is a door/window magnetic contact sensor (reed switch) designed to detect open or closed state of doors and windows. The normally closed contact changes state when the magnet moves away. It is intended for use in basic alarm and security systems, access control setups, and DIY monitoring where compact magnetic sensing is required.

## Long description

BLOW 4926# is a compact magnetic door and window contact sensor with a reed switch configured as normally closed. Designed for basic alarm and security systems, access control setups and DIY monitoring, the sensor detects changes in state when its magnet moves away from the contact. Its small footprint and simple two-part design make it suitable for discreet mounting on frames and sashes where reliable open/closed detection is needed.
Advantages
The normally closed reed contact offers stable closed-state monitoring and clear state change when the magnet is separated, reducing the chance of false triggers caused by contact bounce. The sensor’s compact dimensions and low-profile housing allow for unobtrusive installation on doors and windows. Because it uses a passive magnetic reed mechanism, it requires no internal power source and provides long-term reliability with minimal maintenance.
Suitable for
Home and small-business alarm systems for door and window monitoring
Access control installations that need simple state detection
DIY security and monitoring projects
Retrofit installations where space for sensors is limited
Key specifications
Sensor type: magnetic contact with reed switch (normally closed)
Mounting: surface mount with separate magnet and contact units
Operating principle: magnetic field closes the reed; separation opens the circuit
Power requirements: passive operation (no internal power required)
Housing: compact, low-profile design suitable for door and window frames
Environmental suitability: indoor use; designed for typical residential and commercial climates
How to use
Position the contact unit on the fixed part of the frame and align the magnet on the moving sash or door so that the two parts sit close together when closed. Secure both units using screws or adhesive appropriate to the mounting surface. Connect the sensor leads to the alarm control panel or access controller input, observing the normally closed wiring scheme expected by your system. Test the installation by opening and closing the door or window to confirm the contact opens when the magnet is moved away and closes when it returns.
Usage recommendations
For reliable operation, mount the contact and magnet on clean, flat surfaces and maintain the recommended alignment and gap specified by your installer guide. Avoid placing the sensor near strong external magnetic fields or metal obstructions that could affect the reed operation. Periodically inspect mounting and wiring for corrosion or loosening in environments subject to moisture or vibration.

## FAQ

### How much does the Door contact sensor BLOW 4926# cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 13.07.2026 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 BLOW 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 BLOW 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/11863367/67261737_large.webp