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Wireless Level Detection System direct from Wanlin Fire Protection — 12-year factory experience, 4G Industrial Liquid Level Monitoring System (WL-LT800) certified CE/ATEX/FCC/RoHS/SIL3/ISO9001. Key specs: 4G Cat.4/NB-IoT dual-mode wireless, SCADA integration, Modbus RTU/TCP, 32-point monitoring, cloud dashboard, 0-100m range. MOQ 200pcs, OEM/ODM available.