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Telemetry Level Gauge direct from Wanlin Fire Protection — 12-year factory experience, 4G Radar Liquid Level Gauge (WL-LT500) certified CE/ATEX/FCC/RoHS/SIL2. Key specs: 4G Cat.1/WiFi wireless, Non-contact, ±1mm accuracy, 0-30m range, anti-condensation, 0-30m range. MOQ 200pcs, OEM/ODM available.