# Milesight EM400-UDL NB-IoT | TagoIO Devices

> Outdoor ultrasonic distance sensor for water, tank, object, and snow level monitoring.

![Milesight EM400-UDL NB-IoT](https://decoders.assets.tago.io/decoders/connector/milesight/em400-udl-nb-iot/assets/logo.png)

Outdoor ultrasonic distance sensor for water, tank, object, and snow level monitoring.

The EM400-UDL is a non-contact ultrasonic distance sensor designed for outdoor applications such as monitoring water levels, fill levels of tanks and silos, object presence, or snow levels. It features multiple selective probes with varying detection ranges. The sensor has a high protection IP rating and a waterproof enclosure, allowing it to withstand harsh environments. It operates for up to 10 years using two 9000 mAh batteries. The NB-IoT/Cat.M version supports multiple application modes and includes GNSS for tracking and security.

[Connect this Device](https://admin.tago.io/connectors/5ede22a7427104001c248b08/54730efe4ccc0ee298f1e2d3)

[llms.txt](https://tago.io/llms.txt)