# Magnetic Contact Sensor SATEL B-3CM cylindrical reed switch for doors and windows

**URL:** https://aio.lv/en/product--satel-b-3cm--11863687
**Data updated:** 2026-03-09 17:40 (EET)
**Category:** Smart Sensors
**Manufacturer:** SATEL
**Manufacturer code:** B-3CM
**EAN:** 5905033338159
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--satel-b-3cm--11863687

## 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

Cylindrical magnetic contact sensor SATEL B-3CM (reed switch) for intrusion detection on doors and windows. Designed to detect opening/closing via a magnetic field, it is suitable for installation in frames or profiles where a compact cylindrical form is required. Used in alarm and security systems as a wired normally closed/open sensor to monitor entry points.

## Long description

The SATEL B-3CM magnetic contact sensor is a cylindrical reed switch designed for monitoring doors and windows in wired alarm and security systems. Its compact cylindrical form factor allows installation inside door or window frames and profiles where space is limited. The sensor operates by detecting changes in the magnetic field when a magnet-equipped sash or leaf moves relative to the switch, providing a reliable signal for intrusion detection and status monitoring.
Advantages
The cylindrical design enables discreet installation flush with most frames and profiles, minimizing visible components. As a reed switch-based contact, it delivers simple and robust operation with low power consumption and long service life. The sensor supports normally closed or normally open wiring configurations, making it compatible with a wide range of alarm control panels and wiring layouts. Its mechanical simplicity reduces maintenance needs and improves reliability in typical residential and commercial environments.
Suitable for
 Monitoring doors in residential or commercial installations
 Monitoring windows, skylights, and other opening elements
 Applications requiring concealed or flush-mounted contacts inside frames or profiles
 Integration into wired alarm systems and access control zones
Key specifications
 Form factor: cylindrical reed switch suitable for frame or profile mounting
 Operation principle: magnetic reed contact (mechanical switch actuated by magnet)
 Wiring: supports normally closed (NC) or normally open (NO) configurations
 Installation: designed for concealed or flush mounting in door/window frames
 Applications: wired intrusion detection for doors and windows
How to use
Install the cylindrical reed switch into the designated hole or recess in the door or window frame so that the switch and its magnet counterpart align when the opening is closed. Connect the sensor wiring to the alarm control panel according to the required normally closed or normally open configuration and secure the wiring to prevent mechanical stress. Verify alignment and test the sensor by opening and closing the door or window while observing the control panel or a multimeter to confirm correct state changes.
Usage recommendations
Place the reed switch where the magnet will pass closely and consistently to ensure reliable actuation. Avoid mounting locations exposed to strong external magnetic fields or mechanical vibrations that could cause false triggers. Use appropriate sealing or grommets in outdoor or damp environments to protect wiring and contacts, and verify compatibility with the alarm panel input type before final connection.

## FAQ

### How much does the Magnetic contact SATEL B-3CM cylindrical sensor cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 55 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 SATEL 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 SATEL 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/11863687/67262342_large.webp