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Factory Direct Air Quality Sensor: Wanlin WL-PB400 4G/NB-IoT···
Factory Direct Air Qua···
2026-06-11
air quality sensor direct from Wanlin Fire Protection — 12-year factory experience, WL-PB400 fully certified CE/FCC/RoHS. Key specs: 4G/NB-IoT wireless, 3s alert push via APP/SMS/Call to 5 contacts, 3-year