# Magnetic Contact Sensor Alarmtech KONTAKTRON CYLINDRYCZNY MC340 — door/window magnetic reed switch

**URL:** https://aio.lv/en/product--alarmtech-mc340--11959997
**Data updated:** 2026-03-11 13:59 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** Alarmtech
**Manufacturer code:** MC340
**EAN:** 5901508430748
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.49 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 10.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--alarmtech-mc340--11959997

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Alarmtech KONTAKTRON CYLINDRYCZNY MC340 is a cylindrical magnetic contact (reed) sensor designed for door and window security circuits. The compact sensor detects opening by sensing a magnetic field change and is intended for integration with alarm panels and wired security systems. Suitable for residential and commercial use to monitor access points.

## Long description

Alarmtech KONTAKTRON CYLINDRYCZNY MC340 is a compact cylindrical magnetic contact (reed) sensor intended for monitoring doors and windows in wired security systems. The sensor detects changes in the magnetic field when an access point is opened or closed, providing a reliable input to alarm panels and control units. Its slim, cylindrical form factor allows installation in frames, casings, or other narrow mounting locations where a low-profile contact is required.
Advantages
The magnetic contact offers a simple normally-closed or normally-open switching behavior depending on installation and wiring, enabling straightforward integration with most wired alarm panels. Its cylindrical design reduces visual impact and can be recessed into frames for protection against tampering. The sensor is passive, requiring no internal power source, which simplifies maintenance and reduces lifecycle costs.
Suitable for
 Monitoring residential doors and windows
 Securing commercial access points and cabinets
 Integration with wired alarm control panels and access control systems
 Use in narrow or recessed mounting locations such as frames or profiles
Key specifications
 Type: Cylindrical magnetic reed contact for doors and windows
 Mounting: Recessed or surface in narrow profiles and frames
 Connection: Wired contact suitable for alarm panel inputs
 Power: Passive device (no internal battery required)
 Compatibility: Designed for integration with standard wired security and access control systems
How to use
Install the cylindrical magnet and reed sensor so that the magnet aligns closely with the reed switch when the door or window is closed. Secure the sensor body in a recessed hole or on the frame using appropriate fasteners, and route the connection leads to the alarm panel input following the system wiring diagram. Configure the alarm panel to recognize the contact as normally-closed or normally-open according to the chosen wiring and desired behaviour. Test the contact by opening and closing the monitored access point and verifying the panel status changes accordingly.
Usage recommendations
Position the sensor and magnet with minimal gap for reliable operation and avoid mounting near strong external magnetic fields or large ferrous objects that could affect switching distance. Use suitable cable routing and strain relief to protect the leads, and verify compatibility with the alarm panel input specifications before finalizing installation.

## FAQ

### How much does the Magnetic Contact Sensor Alarmtech MC340 cost, and is it available for purchase?

The price is 12.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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 06.07.2026 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 Alarmtech 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 Alarmtech 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/11959997/67405417_large.webp