--- product_id: 57363127 title: "KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems" brand: "kerui" price: "₨16345" currency: LKR in_stock: true category: "Kerui" url: https://www.desertcart.lk/products/57363127-kerui-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home store_origin: LK region: Sri Lanka --- # 250ft max transmission range 433MHz wireless frequency Low battery LED alert KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems **Brand:** kerui **Price:** ₨16345 **Availability:** ✅ In Stock ## Summary > 🚪🔒 Stay one step ahead—secure your space with instant alerts and wireless freedom! ## Quick Answers - **What is this?** KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems by kerui - **How much does it cost?** ₨16345 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/57363127-kerui-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home) ## 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 - • **Smart Battery Monitoring:** Integrated low battery LED indicator ensures your security never goes dark unexpectedly. - • **Effortless DIY Installation:** Self-adhesive mounting with included double-sided tape—no tools, no hassle. - • **Instant Open/Close Detection:** Triggers immediate alerts when doors or windows are opened beyond 1cm gap—stay ahead of intruders. - • **Universal KERUI Compatibility:** Works flawlessly with all KERUI alarm systems for a cohesive, professional-grade home security setup. - • **Seamless 433MHz Wireless Connectivity:** Reliable signal transmission up to 250 feet for uninterrupted security coverage. ## Overview The KERUI D022 Wireless Door/Window Magnetic Sensor operates on a 433MHz frequency, delivering reliable alerts when doors or windows open beyond 1cm. With a transmission range of up to 250 feet, low battery indication, and easy self-adhesive installation, it integrates seamlessly with all KERUI alarm systems to provide professional-grade home and business security. ## 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 ## 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 | 373,454 in DIY & Tools ( See Top 100 in DIY & Tools ) 689 in Home Alarm Systems | | Brand | KERUI | | Colour | White | | Compatible Devices | Smartphone | | Control Method | App | | Customer Reviews | 4.2 4.2 out of 5 stars (70) | | Included Components | Battery | | Installation method | 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 ![KERUI 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) ![KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - Image 2](https://m.media-amazon.com/images/I/31ITnxI6WeL.jpg) ![KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - Image 3](https://m.media-amazon.com/images/I/41qpEPmS7CL.jpg) ![KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - Image 4](https://m.media-amazon.com/images/I/41jnfR5BLPL.jpg) ![KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - Image 5](https://m.media-amazon.com/images/I/51BfEsvB62L.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 ## Frequently Bought Together - KERUI 433MHz Wireless Door/Window Magnetic Sensor For GSM Home Security Alarm Systems - KERUI 115db DIY Wireless Home Security System,Indoor Outdoor Weather-Proof Siren,Window Door Sensors Motion Sensor,Shed Garage Alarm with Remote Control,Burglar Door Alarm for Hotel Shop House - KERUI Wireless Security PIR Motion Infrared Sensor Detector for Home Security Voice Burglar Alarm System 433mhz --- ## 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.lk/products/57363127-kerui-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home](https://www.desertcart.lk/products/57363127-kerui-433mhz-wireless-door-window-magnetic-sensor-for-gsm-home) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-09-17*