Ultrasonic Distance Sensor Measuring Distance 25–1000 cm EM400-UDL C100 NB-IoT / Cat M – Milesight

The EM400-UDL C100 is designed for professional distance and level measurement in demanding environments. Using ultrasonic sensing, it measures without direct contact with the target medium, making it a strong fit for applications where moisture, dirt, buildup, or direct contact can affect other sensing methods.

This version is built for NB-IoT and Cat M communication, making it suitable for deployments that need direct data transmission over existing cellular infrastructure. That makes it especially useful for distributed monitoring points where separate gateway infrastructure is not practical, such as municipal infrastructure, water management systems, industrial facilities, and remote outdoor sites. Cellular connectivity makes it easier to deploy large-scale monitoring projects with dependable remote reporting.

In addition to distance measurement, the sensor also provides temperature monitoring and tilt status detection. GNSS positioning is also available, which adds value in deployments where the location of the monitoring point needs to be tracked together with measurement data. This is particularly useful for remote, mobile, or hard-to-access assets and field installations.

Typical use cases include tank level monitoring, sewer and drainage level measurement, flood monitoring, storage and barn fill level control, and general distance measurement in industrial and technical installations. It is also well suited for agricultural applications, municipal monitoring projects, and infrastructure deployments that require durable long-term sensing.

With its IP67-rated enclosure, the EM400-UDL C100 is designed for outdoor use and harsh conditions. A conformal coating on the PCBA adds another layer of protection against moisture, dust, and contaminants. Combined with replaceable batteries and long operating life, it is a strong choice for low-maintenance professional monitoring projects.