# Door reed switch sensor BLOW 4925# HO-03N white

**URL:** https://aio.lv/en/product--blow-4925--11863582
**Data updated:** 2026-03-09 17:40 (EET)
**Category:** Smart Sensors
**Manufacturer:** BLOW
**Manufacturer code:** 4925#
**EAN:** 5900804099048
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 4.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blow-4925--11863582

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Wired door reed switch sensor BLOW 4925# (HO-03N) in white. A magnetic contact (kontaktron) designed to detect opening and closing of doors or windows, suitable for basic alarm and security systems. Compact white casing and two-wire connection enable easy surface mounting and integration with alarms, controllers or DIY security setups.

## Long description

Wired door reed switch sensor BLOW 4925# HO-03N white is a magnetic contact sensor designed to detect opening and closing of doors or windows. The compact white plastic casing contains a reed switch operated by a separate magnet; the two-piece design and two-wire connection make it suitable for surface mounting and simple integration with alarm panels, controllers or DIY security setups.
Advantages
The sensor offers a compact form factor and unobtrusive white finish for discreet installation on door and window frames. Its two-wire wired connection provides a reliable, low-latency contact signal compatible with standard alarm inputs and controllers. The separate magnet and contact allow flexible positioning and straightforward surface mounting without recessed installation.
Suitable for
Basic home and small office alarm systems
Window and door intrusion detection
DIY security and monitoring projects
Integration with alarm panels, control units, and zone inputs
Key specifications
Type: Wired reed switch (magnetic contact)
Color: White
Connection: Two-wire
Mounting: Surface-mounted two-piece design (contact + magnet)
Intended use: Door and window opening/closing detection
How to use
Mount the contact and the magnet on the fixed frame and moving part (door or window) so that the magnet aligns with the reed switch when closed. Secure both parts to the surface using screws or adhesive as appropriate for the mounting surface. Connect the two wires to the alarm panel or controller zone input according to the control unit’s wiring scheme, observing normally closed or normally open requirements of the system. Test the sensor by opening and closing the door or window to confirm the control unit registers the state change.
Usage recommendations
For reliable operation, position the magnet within the manufacturer’s recommended gap for the reed switch and avoid placing ferrous materials between the magnet and contact. Use appropriate cable routing and strain relief to prevent wire damage, and verify compatibility with the alarm or control panel input type before installation.

## FAQ

### How much does the Door reed switch sensor BLOW 4925# HO-03N cost, and is it available for purchase?

The price is 5.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 24 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 16.07.2026 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/11863582/67262180_large.webp