24V smoke heat detector fire safety smoke detection fire alarm fire protection Wanlin Fire Control smoke alarm fire detector fire sensor photoelectric detector EN54 certified CE approved fire safety equipment addressable detector conventional detector wireless smoke alarm battery smoke detector hardwired detector OEM smoke detector wholesale fire alarm fire detection system smart fire alarm IoT fire safety commercial fire protection industrial smoke detector Battery powered smoke detector wholesale industrial smoke detec Fire inspection report Fire compliance certification Fire hazard remediation Fire inspection cost Fire inspection pricing Wanlin Jellyfish IoT Fire safety inspection services Fire system maintenance Commercial fire safety case Fire protection China manufacturer Global fire safety solutions Fire safety Serbia Fire inspection equipment Fire safety audit Smart fire protection rechargeable smoke detector test kit detector testing equipment CE certified security system testing fire alarm maintenance smoke alarm tester wireless detector tester detector calibration smoke detector tester fire engineering tools fire alarm test tool UL listed telescopic test tool facility management Wireless smoke detector Addressable combined smoke heat detector Conventional 4 wire smoke heat detector industrial smoke detect Integrated smoke heat sensor Warehouse industrial smoke sensor OEM smoke heat composite detector