---
product_id: 511502161
title: "SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch"
brand: "seco-larm"
price: "€ 139.42"
currency: EUR
in_stock: true
url: https://www.desertcart.sk/products/511502161-sm-4201-lq-enforcer-track-mount-overhead-door-magnetic-contact
store_origin: SK
region: Slovakia
---

# 3-inch adjustable gap 1A current rating, 10V DC Armored 36-inch wire leads SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch

**Brand:** seco-larm
**Price:** € 139.42
**Availability:** ✅ In Stock

## Summary

> 🚪 Secure your space with precision and durability — don’t let your door’s status slip through the cracks!

## Quick Answers

- **What is this?** SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch by seco-larm
- **How much does it cost?** € 139.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/511502161-sm-4201-lq-enforcer-track-mount-overhead-door-magnetic-contact)

## Best For

- seco-larm enthusiasts

## Why This Product

- Trusted seco-larm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable aluminum housing paired with armored cable ensures rugged, long-term performance.
- • **Effortless Installation:** Track-mount design and included hardware make setup fast and hassle-free—get protected in no time.
- • **Fits Wide Door Channels:** Adjustable design accommodates up to 3-inch gaps for versatile overhead door monitoring.
- • **Industrial-Grade Reliability:** RoHS certified and rated for -15° to 160°F operation, perfect for both residential and commercial use.
- • **Precision Contact Technology:** Iridium-plated contacts deliver reliable closed-loop circuit operation with 50 million switch cycles.

## Overview

The Seco-Larm SM-4201-LQ Enforcer Track-Mount Magnetic Contact Switch is engineered for professional-grade overhead door monitoring. Featuring an adjustable 3-inch gap fit, armored 36-inch wire leads, and iridium-plated contacts, it guarantees reliable closed-loop circuit performance with up to 50 million switch cycles. Its rugged aluminum housing and RoHS certification ensure durability and environmental compliance, while the fast installation process makes it ideal for both residential and industrial applications.

## Description

SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch

## Features

- Designed to monitor open/closed status of an overhead door with a wide gap
- Adjustable design to fit most door-channel widths (up to 3 inches)
- Durable aluminum housing with 36-inch wire leads enclosed in armored cable
- For closed loop circuits
- Fast, easy installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Operation Mode | automatic |
| Current Rating | 1 Amps |
| Operating Voltage | 10 Volts (DC) |
| Contact Type | Normally Open |
| Connector Type | Wire Leads |
| Brand | Seco-Larm |
| Terminal | Through Hole |
| Contact Material | Iridium |
| Number of Positions | 1 |
| Specification Met | Ip65, Rohs |
| Control Method | Sensor |
| Colour | Grey |
| Wattage | 10 Watts |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Manufacturer | Seco-Larm |
| Country of Origin | USA |
| Model number | SM-4201-LQ |
| Item Weight | 381 g |
| Package Dimensions | 21.41 x 12.8 x 7.19 cm; 381 g |
| Item model number | SM-4201-LQ |
| Included Components | Alarm |
| Are batteries included? | No |

## Product Details

- **Operation Mode:** automatic
- **Current Rating:** 1 Amps
- **Operating Voltage:** 10 Volts (DC)
- **Contact Type:** Normally Open
- **Connector Type:** Wire Leads

## Images

![SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch - Image 1](https://m.media-amazon.com/images/I/519jYYOGDXL.jpg)
![SM-4201-LQ Enforcer Track-Mount Overhead Door Magnetic Contact Switch - Image 2](https://m.media-amazon.com/images/I/41eeoJuFSBL.jpg)

## Questions & Answers

**Q: Is there a way to get a longer cable for the wires?**
A: The wires can be extended with standard alarm wire.

**Q: can I use this for a 120 volt circuit, or is this low voltage only?**
A: Low voltage, 24 ga. Wires. If you use a transformer like a doorbell transformer, it probably will work as it will be 17 vAC for that. I used it for a shut off of my garage heater so it shuts the heat off if the door opens until it lowers again.

**Q: How can I wire this to turn on a light when the garage door is open (magnet away from switch)? Use a bus bar & relay?**
A: This is just a 2 wire sensor... so yeah, you'd definitely need a relay for the light. Then a way to trigger the relay when certain conditions are met. You could easily do that using a MIMO (multi input multi output) device and some kind of automation software. I'm using this with a Z-wave MIMO - the Zooz 700 is a solid one too if you're into that. But if you're looking to do this kind of stuff, i would recommend just using automation software like Home Assistant or something like that.

**Q: What is the lowest DC voltage that this switch will operate at?**
A: We asked the manufacturer and they replied: "That is a passive magnetic contact.  So when the magnet comes near the switch it flips state. So it can do real low voltage."

## Frequently Bought Together

- Seco-Larm SM-4201-LQ Track-Mount Overhead Door Magnetic Contact Switch, Rugged Aluminum Housing, 36" Wire Leads, for Closed Loop Circuits, 3" Gap, Weatherproof, Mounting Bracket Included
- Zooz Z-Wave Long Range Relay ZEN17 800LR for Awnings, Garage Doors, Sprinklers, and More | 2 x NO-C-NC Relays (20A, 10A) | Hub Required (Compatible with Z-Box, Home Assistant, and Hubitat)
- WESUA Magnetic Switch Alarm Sensor Overhead Garage Door Contacts with L Bracket

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sk/products/511502161-sm-4201-lq-enforcer-track-mount-overhead-door-magnetic-contact](https://www.desertcart.sk/products/511502161-sm-4201-lq-enforcer-track-mount-overhead-door-magnetic-contact)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-30*