Milesight Ultrasonic Distance Sensor EM400‑UDL‑868M – PN: W100 Pro – LoRaWAN®

The Milesight EM400‑UDL‑868M W100 Pro is an advanced, non-contact ultrasonic distance sensor engineered for accurate level and distance measurements in outdoor and industrial environments. Designed for applications such as liquid level monitoring, tank fill measurement, and static water detection, the Pro version (W100) provides an extended detection range of 50 to 1000 cm with ±1% full-scale accuracy across a wide temperature range (‑30°C to +65°C).

This rugged sensor features an IP67-rated housing, moisture-resistant coating, and a durable ABS + PC enclosure (UL94 V0). These attributes make it suitable for harsh outdoor environments, including tanks, ponds, and reservoirs. The EM400‑UDL includes:

• A built-in NTC temperature sensor for heat or fire risk detection

• An internal 3-axis accelerometer for tilt or lid movement monitoring

• NFC support for easy setup and configuration

• Alarm and threshold switching features for event-based responses

It is powered by two 9000 mAh ER26500 Li-SOCl2 batteries, offering a battery life of over 10 years under standard LoRaWAN® operating intervals. The EM400‑UDL‑868M can be mounted on flat surfaces using screws and integrates easily with Milesight IoT Cloud and LoRaWAN® gateways.

Key Applications:

• Liquid level measurement in tanks and containers

• Monitoring static or slow-moving water bodies

• Smart city water infrastructure

• Industrial fill-level detection and remote monitoring