fire detector compatibility check

dirty sensor detection — Wanlin, 12-year Chinese smart fire protection manufacturer, WL-SFP100 (Smart Photoelectric Smoke Detector) certified UL/FM/CE/EN54/NFPA 72. Dual-Wavelength Photoelectric + 4G LTE Cat.1 + IoT Cloud. OEM/ODM from 500 units, factory direct pricing 50-70% below Western brands, 60+ countries.