Import Alarm Motion Sensors Pir Motion Detector — Buy in wholesale FOB from Supplier in China

The Alarm Motion Sensors PIR Motion Detector from Shenzhen Sumring Technology Co., Limited is a passive infrared intrusion detector controlled by an MCU (microcontroller unit) and designed for wall or ceiling mounting. The device uses a Fresnel lens to focus infrared radiation onto a dual-element pyroelectric sensor, with double temperature compensation to maintain sensitivity stability across ambient temperature variations. Pulse count adjustment allows the installer to set the trade-off between detection sensitivity and false alarm immunity. The alarm output is selectable as normally closed (N.C.) or normally open (N.O.), with alarm duration configurable to either 3 seconds or 30 seconds. Intelligent floating threshold technology dynamically adapts the trigger threshold to background conditions.

The unit incorporates specific anti-interference measures: anti-white-light circuitry to reject flash sources up to a specified intensity, and anti-RF interference rated at 20V/m at 1GHz, which addresses common false triggers from mobile phone base stations and radio equipment. The Fresnel lens pattern determines the detection zones and coverage geometry, typical for PIR detectors in this class. SMT (surface mount technology) manufacture is used for component placement, which generally improves consistency and thermal performance over through-hole assembly in high-volume production. The patent appearance design suggests a unique housing moulding, though the specific patent number is not provided.

This detector is suited for residential alarm systems, commercial building intruder detection, and light industrial perimeter monitoring where wired sensor loops are preferred. The N.C./N.O. selectable output allows integration with most alarm control panels, whether conventional or addressable. Buyers should confirm the detection range, coverage angle, and mounting height specifications, as these determine the protected area per detector. The Shenzhen address places manufacturing within the Pearl River Delta electronics cluster, with established component supply chains for pyroelectric sensors and Fresnel lens moulding.

Shenzhen Sumring Technology Co., Limited is located at A1613, Huayibuilding, Pingji Road, Longgang District, Shenzhen 518112, Guangdong Province, China. The Longgang district is a major manufacturing zone within Shenzhen, with particular concentration in electronics assembly and security device production. The supplier holds a 'harbor' trust tier designation. The response rate is recorded at 0.00% with zero average response hours, indicating no platform-mediated communication history is available. Buyers should initiate direct enquiry to establish contact reliability and response times.

The company profile available through the listing describes the PIR motion detector's technical features in detail but provides no information about company history, factory size, annual turnover, employee count, or clientele. No certifications (CE, FCC, EN50131 security grade, or ISO9001) are mentioned. The patent reference for appearance design is not accompanied by a patent or design registration number for verification. Buyers should request a company brochure, factory audit report, and product test certificates before committing to volume orders. The detailed technical description suggests engineering involvement, but this should be verified through sample evaluation and technical discussion.