Milesight Ultrasonic Distance Sensor EM400-UDL-868M – PN: W050 Pro

The Milesight EM400-UDL W050 Pro is an industrial-grade ultrasonic distance sensor engineered for precise level measurement in outdoor and demanding environments. It provides non-contact detection of distances from 30 to 500 cm, with a measurement accuracy of ±1% FS and 1 mm resolution.

Its rugged IP67-rated enclosure made of ABS+PC (UL94 V0) ensures excellent protection against water, dust, and harsh conditions. The integrated NTC temperature sensor enhances safety by enabling burn detection alarms. Additionally, a 3-axis accelerometer helps monitor device tilt status.

The EM400-UDL offers support for two communication technologies:

• LoRaWAN® for long-range, low-power wide-area networking (up to 15 km line of sight)

• NB-IoT/Cat-M with optional GNSS for location tracking and IoT platform integration

Powered by two 9000 mAh batteries, the sensor supports up to 10 years of operation (depending on the reporting interval and mode). It can be configured via NFC using a mobile app and supports features like threshold alarms, calibration, and cumulative reporting (NB only).

Key Applications:

• Liquid level monitoring in tanks, reservoirs, wells

• Fill level detection in containers

• Static water surface measurement

• Infrastructure & smart city deployments