EM400-UDL-N03GL-W050 - Milesight NB-IoT/CatM EM400-UDL Ultrasonic 5 Metre Distance Sensor with IP67 Case
EM400-UDL-N03GL-W050 - Milesight NB-IoT/CatM EM400-UDL Ultrasonic 5 Metre Distance Sensor with IP67 Case
Features
EM400-UDL is a versatile product among EM400 series because of its detection range, resolution, and accuracy, is designed to cater to the demands of professional applications. Equipped with prolonged battery life and robust IP67 rated enclosure, EM400-UDL is the perfect fit for professional and demanding applications.
Leveraging ultrasonic distance detection, EM400-UDL ensures a stable and reliable performance while detecting different solid or liquid mediums. Featuring non-contact distance measurement, the probe of EM400-UDL will remain unaffected or contaminated by the medium detected, and deliver highly accurate measurement.
- LoRaWAN® and NB-loT Versions for Broader Applications
- Great Flexibility with Multiple Versions
- Non-Contact Distance Measurement
- Value-added Temperature and Tilt Monitoring
- LoRaWAN® & NB-IoT & CAT M Versions Available
- Various Professional Applications
- Long-Lasting Battery Life of up to 10 Years
- Rugged and Reliable IP67 Rated Enclosure
- Positioning Function Enabled by GNSS Modules (NB-loT Version)
Non-Contact Distance Measurement
Leveraging ultrasonic distance detection and featuring non-contact distance measurement, the probe of EM400-UDL will remain unaffected or contaminated by the medium detected, and deliver highly accurate measurement.

Device Tilt Status Monitoring
The EM400-UDL is equipped with a built-in 3-axis accelerometer which can be used to monitor the device tilt status and alert the users whether the device is well positioned.

Temperature Monitoring
With built-in NTC thermistor, EM400-UDL can monitor the temperature and send alert in time if the temperature changes sharply which may indicate combustion.

Rugged and Reliable IP67 Rated Enclosure
IP67 rated enclosure ensures EM400-UDL is protected against dust, water, and other environmental hazards, enabling it to withstand harsh environment.
EM400-UDL also features a conformal coating on its PCBA, which provides an extra layer of protection against moisture, dust, and other contaminants that can damage electronic components.

Ultra-long Battery Life of up to 10 Years
EM400-UDL is equipped with high-capacity and easily-replaceable batteries. The conditions of battery life are specified below:
- LoRaWAN® Version: Over 10 years (10-min Interval, 25 °C)
- NB-IoT/Cat M Version: TCP/UDP-10 years, MQTT/AWS-5 years (4 times report per day, each report includes 12 packages with 30-min collection interval, 25 °C)

Cloud Data Management Milesight IoT Cloud
- Data Visualization Dashboard: All figures in a glance
- Automatic Triggers: Interactive collaboration with Milesight IoT sensors to realize scene-based automation
- Regular Reports & Real-Time Alerts: Data-based insights
- Android & iOS App: Manage devices at your fingertips

Specifications
Technical Specifications
| Brand | Milesight |
|---|---|
| Manufacturer Part Number | EM400-UDL-N03GL-W050 |
| Application Mode | TCP/UDP/MQTT/AWS/Milesight IoT Cloud |
| Detection Range | 30 - 500cm |
| Detection Accuracy | ±1% FS (- 30°C ~ 65°C) |
| Resolution | 1mm |
| Temperature Range | -40° - 125°C |
| Resolution | 0.1°C |
| GNSS Positioning Resolution | 0.000001 |
| Cellular Bands | Cat M1:B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B27/B28/B66/B85, Cat NB2:B1/B2/B3/B4/B5/B8/ B12/B13/B18/B19/B20/B25/B28/B66/B71/B85 |
| Sim Slot | 1 Micro SIM 3FF |
| Configuration | Mobile APP(NFC) |
| Power Supply | 2 x 9000 mAh ER26500 Li-SOCL2 Batteries |
| Battery Life | TCP/UDP-Around 10 Years, MQTT/AWS-Around 5 Years |
| Operating Temperature | -30°C to +70°C |
| Ingress Protection | IP67 |
| Dimensions | 118 × 65 × 80 mm |
| Material and Colour | ABS + PC (Flame Retardant), Black gray |
| Mounting | On the Flat Surfaces with Screws |
Not happy? Return within 7 days of delivery for a full refund or exchange. Items must be unused and in original packaging. Contact contact@kwtech.co.nz to arrange.
| Brand | Milesight |
|---|---|
| Product Type | B2B - IoT & Industrial |
| Weight | 0.5 kg |
Shipping Information
- Free NZ-wide shipping on orders over $299
- Standard delivery 2–5 business days
- Rural delivery may take an additional 1–2 days
- Same-day dispatch for orders placed before 2pm (weekdays)
Returns Policy
- 7-day returns on unused items in original packaging
- Faulty or damaged products covered under warranty
- Contact our support team to initiate a return



