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it can greatly reduce false alarms generated by targets other than humans or vehicles
IOT-S500SMT User Guide
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Milesight EM500-UDL Ultrasonic Distance / Level Sensor Frequency Bands:AS923 it can greatly reduce falseDue to different retail prices in different countries, for Milesight products, please contact us to get the latest quotations. EM500 UDL provides highly accurate distance measurement for a variety of applications in harsh environments like flood monitoring, wastewater management, fill level monitoring in grains or fertilizer. The measurement is based on ultrasonic waves transmitted and reflected back from nearby objects. EM500 UDL data sheet. pdf (3.