# Magnetic door sensor BLOW 4916# HO-03 brown — reed switch contact for door/window security

**URL:** https://aio.lv/en/product--blow-4916--11863528
**Data updated:** 2026-03-09 17:40 (EET)
**Category:** Smart Sensors
**Manufacturer:** BLOW
**Manufacturer code:** 4916#
**EAN:** 5900804098898
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 4.54 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blow-4916--11863528

## 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

Magnetic door/window sensor BLOW 4916# (HO-03) in brown is a reed-contact sensor for basic intrusion detection and door/window status monitoring. The compact sensor consists of a switch body and magnet to detect opening/closing; it is suitable for alarm panels, home security systems and access control. Designed for surface mounting on doors, frames or windows where a discreet brown finish is required.

## Long description

The BLOW magnetic door sensor 4916# HO-03 in brown is a compact reed-switch contact designed to monitor the open/closed status of doors and windows. The sensor comprises a switch body and a separate magnet; when the magnet moves away from the switch, the reed contact changes state to signal an opening. It is intended for surface mounting and integrates with alarm panels, home security systems and access control units where a low-profile, brown finish is required.
Advantages
This magnetic sensor offers a simple, reliable contact mechanism based on a reed switch, providing consistent detection of door and window openings. Its compact dimensions and surface-mount design make installation straightforward on frames and sashes without extensive modification. The brown casing provides discreet visual integration with wooden doors and dark-coloured frames. The sensor operates without batteries or separate power supply for the contact itself, reducing maintenance needs when used as a passive zone input to alarm or access control systems.
Suitable for
Basic intrusion detection on doors and windows
Status monitoring for home security systems and alarm panels
Integration with access control devices to detect door/window positions
Retrofit installations on wooden doors, frames and dark-coloured joinery
Key specifications
Sensor type: reed contact (magnetic switch)
Mounting: surface mount for door frames and window sashes
Finish: brown casing suitable for dark-coloured joinery
Components: separate switch body and matching magnet
Signal: normally closed / normally open contact state (changes when magnet is separated)
Compatibility: intended for wired connection to alarm panels and access control inputs
Operating principle: passive magnetic actuation, no internal power for the contact
How to use
Position the switch body on the stationary part of the door or window frame and the magnet on the moving sash so that they align when the door or window is closed. Fix both parts using screws or adhesive as appropriate for the mounting surface, ensuring the specified gap for reliable operation is maintained. Connect the sensor leads to the alarm panel or access control input following the panel manufacturer’s wiring diagram, observing correct tamper and zone configurations if required. Test the contact by opening and closing the door or window to confirm that the system registers the change of state.
Usage recommendations
For reliable long-term operation, install the sensor on clean, dry surfaces and avoid placing the magnet beyond the recommended gap. Use screws for permanent mounting on wooden frames; use suitable adhesives only when mechanical fixing is not possible. Verify compatibility with the control panel’s input type and perform periodic functional tests as part of routine system maintenance.

## FAQ

### How much does the BLOW 4916# HO-03 magnetic door sensor 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 — 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 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/11863528/67262113_large.webp