---
product_id: 57363127
title: "433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems"
brand: "kerui"
price: "€ 42.80"
currency: EUR
in_stock: true
reviews_count: 8
category: "Kerui"
url: https://www.desertcart.fr/products/57363127-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home-security
store_origin: FR
region: France
---

# 250ft max transmission range 433MHz wireless frequency Battery included with low-battery alert 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems

**Brand:** kerui
**Price:** € 42.80
**Availability:** ✅ In Stock

## Summary

> 🔐 Stay one step ahead—secure your space with smart wireless precision!

## Quick Answers

- **What is this?** 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems by kerui
- **How much does it cost?** € 42.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/57363127-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home-security)

## Best For

- kerui enthusiasts

## Why This Product

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

## Key Features

- • **Effortless DIY Installation:** Self-adhesive mounting and simple setup save time and hassle.
- • **Smart Low Battery Indicator:** Stay ahead of downtime with LED alerts before power runs out.
- • **Universal KERUI Compatibility:** Plug-and-play with all KERUI alarm systems for a cohesive security network.
- • **Extended 250ft Communication Range:** Keep your home protected even from a distance with powerful signal reach.
- • **Seamless 433MHz Wireless Connectivity:** Instant alerts with reliable radio frequency for uninterrupted security.

## Overview

The KERUI 433MHz Wireless Door/Window Magnetic Sensor offers a robust, battery-powered security solution that instantly alerts your KERUI alarm system when doors or windows open. Featuring a 250-foot wireless range, easy self-adhesive installation, and a smart low-battery LED indicator, it ensures reliable, hassle-free protection for your home or business.

## Description

Installation (1)Make sure the D022 sensor is within 250 feet of your control unit. It will reduce the distance if there are barriers in between. Our Z09 signal repeater (ASIN: B01M7TFXQ5) helps boost the signal range if the distance between the alarm host and detector is too long or obstacles exist. (2)Place the sensor transmitter (larger piece) on the non-moving part of the door or window frame, and the magnet on the moving portion of the door. For proper operation, there should be no more than a 1/2 inch gap between the transmitter and magnet when the door or window is closed. (3)Hold the magnet and transmitter in place by hand where you wish to install them, then move them in and out of the closed position, making sure the LED light blinks in response. This will confirm that the door and frame are spaced correctly to accommodate the sensor.LED Indicator When the door or window is opened, LED 1 will turn on red for 2 seconds, and the sensor will send an alert signal to the main unit to alarm. When the battery run low, LED 2 will turn on red and stay on, to notify you that the battery needs changing otherwise it could not function properly.Specification Battery: 1pcs 23A 12V battery (Included) Current Consumption: less than 20uA; less than 15mA while transmitting Transmit Frequency: 433MHz Transmit Duration: less than 1 second Transmit Distance from host: more than 80m (Line of Sight) Installation: less than 1cm between the transmitter and magnet Coding Type: Fixed Code Dimension: 71(L) x 36(W) x 15(H)mm Operating Temp: -10 ~ +40 Celsius degree Humidity: less than 90% Material: ABS PlasticKit Includes 1* Wireless Door/Window Contact Sensor Free Battery and Double-Sided Tape

Review: Good and works as expected - Just the same as the original one I bought with the kit. Had to bind it to my system, the instructions I already had made quite easy work of that, basically switching the main unit on and off a few times till the right beep sequence was emitted One thing that bugged me with the original one was how quick the battery ran out, then I tried to fit a larger rechargeable battery of the same voltage but it blew the door sensor, that's why I've had to buy this one ! Instead this time I've fitted an on off switch, successfully , much better now ! Eco friendly and pocket friendly
Review: Works good - I've fitted this wireless alarm sensor to the door. I've connected the alarm sensor wirelessly to GSM alarm. It worked good, and had no problems setting it up.

## Features

- Designed to detect if a door/window or anything it is affixed to is open or closed. When the transmitter is separated from the magnet more than 1cm, the sensor will instantly send an alert signal to the host it is paired with to alarm.
- Compatible with ALL KERUI ALARM SYSTEM. The D022 door/window contact runs on 433MHz radio frequency, and it needs a home and business security system base unit to be paired with in order to operate, cannot work alone.
- Communication distance from the base unit is up to 250 feet away unobstructed. The antenna can be drawn out to maximize its transmission range.
- Battery operated with one (1) 23A 12V battery (Included), easy to mount with double-sided tape (Included).
- Low Battery Indication. When the battery run low, LED 2 will turn on red and stay on, to notify you that the battery needs changing otherwise it could not function properly.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B072ZTRL8N |
| Alert Type | Entry |
| Assembly Instructions Description | DIY |
| Battery Cell Composition | Alkaline |
| Best Sellers Rank | 90,875 in DIY & Tools ( See Top 100 in DIY & Tools ) 134 in Home Alarm Systems |
| Brand | KERUI |
| Colour | White |
| Compatible Devices | Smartphone |
| Compatible devices | Smartphone |
| Connectivity technology | Wireless |
| Control Method | App |
| Customer Reviews | 4.3 out of 5 stars 69 Reviews |
| Included Components | Battery |
| Installation method | Self-Adhesive |
| Installation type | Self-Adhesive |
| Manufacturer | KERUI |
| Maximum Range | 250 Feet |
| Model Number | D022 |
| Network Connectivity Technology | Wireless |
| Part Number | D1527 |
| Power source | Battery Powered |
| Sensor Technology | Contact Sensor |
| Sound Level | 140 Decibels |
| UPC | 607467345691 |
| Unit Count | 1.0 count |
| Voltage | 12 Volts |

## Product Details

- **Brand:** KERUI
- **Colour:** White
- **Compatible devices:** Smartphone
- **Connectivity technology:** Wireless
- **Power source:** Battery Powered

## Images

![433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - Image 1](https://m.media-amazon.com/images/I/61V+Tpf-A7L.jpg)

## Questions & Answers

**Q: We bought two extra door sensors to add to existing system but can’t get them to connect to the base. Any ideas ?**
A: Dear friend,
Please unplug/plug the siren for 3 times. you will 3 beeps. please trigger the two door sensors very  quikly by seperate the door sensor from magnet stip.
If any other problem,please feel free to contact us via Amazon message or after-sale email fuers.csc01@outlook.com

**Q: What plastic is it made of?**
A: Hey there,
The D022 door/window sensor is made of ABS plastic, and we have added that information to the item listing, please have a check.
Fuers Support

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good and works as expected
*by S***7 on 31 October 2023*

Just the same as the original one I bought with the kit. Had to bind it to my system, the instructions I already had made quite easy work of that, basically switching the main unit on and off a few times till the right beep sequence was emitted One thing that bugged me with the original one was how quick the battery ran out, then I tried to fit a larger rechargeable battery of the same voltage but it blew the door sensor, that's why I've had to buy this one ! Instead this time I've fitted an on off switch, successfully , much better now ! Eco friendly and pocket friendly

### ⭐⭐⭐⭐⭐ Works good
*by P***N on 16 July 2025*

I've fitted this wireless alarm sensor to the door. I've connected the alarm sensor wirelessly to GSM alarm. It worked good, and had no problems setting it up.

### ⭐⭐⭐⭐⭐ Good item
*by M***S on 17 January 2020*

Bought 11 pieces in addition to the Kerui home alarm system set. Total 21 pieces as part of the home alarm system, none defective. Able to trigger the alarm as far as 20m from control panel (maximum distance in my house) with 2 stone walls in between.

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-09-15*