Description
The Milesight EM400-UDL-N03GL-W050 is a high-precision, non-contact ultrasonic distance sensor designed for professional outdoor applications such as monitoring water levels, tank fill levels, and snow depth. This Pro version features a detection range of 30 to 500 cm with ±1% FS accuracy and operates via cellular NB-IoT/Cat M1/Cat NB2 connectivity with integrated GNSS for location tracking. Built to withstand harsh environments, it boasts an IP67-rated waterproof enclosure, a damp-proof internal coating, and a 3-axis accelerometer for tilt monitoring. The device is powered by two 9000 mAh batteries providing up to 10 years of life and supports easy configuration via NFC and the Milesight ToolBox app. Its compatibility with protocols like MQTT, TCP, and UDP ensures seamless integration with various IoT platforms, including Milesight IoT Cloud and AWS.
For more technical information, please see the datasheet.







