--- product_id: 207038484 title: "QS1231-840 IQ Wireless Motion-S Sensor" brand: "qolsys" price: "S/.397" currency: PEN in_stock: true reviews_count: 8 category: "Qolsys" url: https://www.desertcart.pe/products/207038484-qs1231-840-iq-wireless-motion-s-sensor store_origin: PE region: Peru --- # Pet immune up to 40 lbs 30 ft sensor range Encrypted S-Line tech QS1231-840 IQ Wireless Motion-S Sensor **Brand:** qolsys **Price:** S/.397 **Availability:** ✅ In Stock ## Summary > 🔐 Secure your space, smartly and silently. ## Quick Answers - **What is this?** QS1231-840 IQ Wireless Motion-S Sensor by qolsys - **How much does it cost?** S/.397 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/207038484-qs1231-840-iq-wireless-motion-s-sensor) ## Best For - qolsys enthusiasts ## Why This Product - Trusted qolsys brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wide-Angle Detection:** Covers up to 30 feet with an 80° horizontal sensing angle—perfect for large open spaces and busy walkways. - • **Smart Automation Ready:** Create custom rules like turning on lights when motion is detected or triggering alarms instantly for total peace of mind. - • **Pet-Friendly Protection:** Smart pet immunity up to 40 lbs means no false alarms from your furry friends, only real threats. - • **Next-Level Signal Security:** Encrypted S-Line technology ensures your alerts are hacker-proof and seamlessly compatible with legacy 319.5 systems. - • **Effortless Installation & Power:** Compact wall-mount design powered by included AAA batteries for quick setup and reliable performance. ## Overview The Qolsys IQ Motion-S QS1231-840 is a cutting-edge encrypted PIR motion sensor designed for professional-grade home and business security. It offers a 30-foot detection range with pet immunity up to 40 lbs, supports legacy 319.5 MHz systems, and enables smart automation rules. Powered by 2 included AAA batteries and featuring a sleek wall-mount design, it delivers reliable, tamper-resistant protection with minimal false alarms. ## Description The IQ Motion-S is an encrypted PIR that is as powerful as it is affordable. Leveraging our proprietary S-Line Technology it encrypts signals sent to the IQ panel while still providing support for legacy 319.5 systems. Pet immune up to 40 pounds, the IQ Motion-S is designed to mount on a flat surface or in a corner. SPECIFICATIONS - Code outputs: paring, tamper, tamper restore, alarm detect motion, alarm restore, supervisory, low battery - Transmitter frequency: 319.5MHZ +-15KHz - Transmitter bandwidth: 24KHZ - Modulation type: ASK-OOK - RF output power 91.1dBuV +/- 5% at 3m - Sensor Range 30 ft (9.1 m) x 40 ft (12.2 m) - Maximum Horizontal Sensing Angle 80° - Operating Temperature: -10˚C~50˚C - Relative Humidity: 5-95% - Non-Condensing Storage Temperature: -40˚C to 80˚C Review: Work Well. - Useful. Works with our security system in place. Has an accent to the alarm but still is something English Speakers can understand, Review: perfect - This works just like the one originally installed by the security company. I did not even need to uninstall the wall bracket. I just replaced the new one with the old. ## Features - Encrypted S-Line sensor technology protects signals sent to the IQ Panel while still providing support for legacy 319.5 systems - Provides security coverage up to 30’ in a large open area - Use to create rules such as “When someone enters the room, turn on light” or “Trigger alarm when intruder detected” - Pet immune up to 40 lbs ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Qolsys | | Color | white | | Power Source | Battery Powered | | Item Weight | 0.03 Kilograms | | Maximum Range | 40 Feet | | Mounting Type | Wall Mount | | Battery Description | 2 x AAA (Alkaline) | | Compatible Devices | Qolsys IQ Panel, Smart Home Hubs | | Number of Batteries | 2 AAA batteries required. (included) | | Operating Temperature | 5E+1 Degrees Celsius | | Recommended Uses For Product | Walkway | | Upper Temperature Rating | 122 Degrees Fahrenheit | | Manufacturer | Qolsys | | UPC | 608597381009 048994996718 | | Part Number | QS1231-840 | | Item Weight | 1.13 ounces | | Product Dimensions | 3.5 x 2.5 x 2.5 inches | | Item model number | QS1231-840 | | Batteries | 2 AAA batteries required. (included) | | Item Package Quantity | 1 | | Batteries Included? | Yes | | Batteries Required? | No | | Battery Cell Type | Alkaline | | Description Pile | 2 x AAA (Alkaline) | ## Product Details - **Brand:** Qolsys - **Color:** white - **Power Source:** Battery Powered - **Item Weight:** 0.03 Kilograms - **Maximum Range:** 40 Feet ## Images ![QS1231-840 IQ Wireless Motion-S Sensor - Image 1](https://m.media-amazon.com/images/I/41JQr5FI9FL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Work Well. *by P***N on April 28, 2025* Useful. Works with our security system in place. Has an accent to the alarm but still is something English Speakers can understand, ### ⭐⭐⭐⭐⭐ perfect *by D***R on December 15, 2024* This works just like the one originally installed by the security company. I did not even need to uninstall the wall bracket. I just replaced the new one with the old. ### ⭐ Defective, used - waste of time *by J***N on January 5, 2025* Units appeared to have been opened before. No instruction sheet or mounting tape. We opened and tested two units. Got false triggering on both units. Installing on an Interlogix Concord 4 system. We found no support at the manufacturer. I suspect we have been shipped defective returned units. We are returning all five we ordered. ## Frequently Bought Together - Qolsys IQ Motion-S QS1231-840 - QOLSYS IQ DW MINI S-LINE Encrypted Door/Window Sensor QS1135-840 - Qolsys DW Mini-S (2-Pack) Wireless Contact Sensor for Windows & Doors - S-Line Encrypted 319.5 MHz - Window Alarm Sensor for Smart Home - Create Personalized Notifications & Rules --- ## 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.pe/products/207038484-qs1231-840-iq-wireless-motion-s-sensor](https://www.desertcart.pe/products/207038484-qs1231-840-iq-wireless-motion-s-sensor) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-05-13*