EM400-UDL is a non-contact ultrasonic distance sensor designed for outdoor applications such as monitoring water level, fill level of tanks and silos, presence of objects, or snow level. It features multiple selective probes with varying detecting ranges to meet diverse requirements. With a high protection IP rating and waterproof enclosure, EM400-UDL can withstand harsh environments, and it can work up to 10 years with two 9000 mAh batteries.

Milesight offers the LoRaWAN® version and NB-IoT/Cat.M version to meet different communication needs. The LoRaWAN® version can be integrated with Milesight LoRaWAN® gateway and Milesight IoT Cloud solution, enabling remote and visual management of all sensor data. The NB-IoT/Cat.M version not only supports multiple application modes to be compatible with IoT platforms but also is equipped with GNSS for tracking and security purposes.

 

Features

Shared values

• Selective probes vary from 25 to 1000 cm for multiple applications.
• Two built-in 9000 mAh replaceable batteries that work for up to 10 years without replacement.
• Equipped with NTC temperature sensor for the detection and alarm of burning.
• Built-in 3-axis accelerometer sensor to monitor device tilt status.
• Damp-proof coating inside and IP67 waterproof enclosure for outdoor applications.
• Equipped with NFC for one-touch configuration, support card emulation mode.

 

LoRaWAN® Version Only

• Ultra-wide-distance wireless transmission up to a line of sight of 15 km.
• Function well with standard LoRaWAN® gateways and network servers.
• Compatible with Milesight IoT Cloud for remote management.

 

NB-IoT/Cat.M Version Only

• Equipped with GNSS positioning for tracking.
• Support cumulative number report function for power saving.
• Support multiple network protocols to be compatible with IoT platforms.

Product Specification

Download EM400-UDL Specification in PDF [ENG]

Model	EM400-UDL (Pro version)
Measurement (Distance)
Range	W050: 30 ~ 500 cm W100: 50 ~ 1000 cm
Accuracy	±1% FS(- 30°C ~ 65°C)
Resolution	1 mm
Measurement (Device Position)
Status	Normal/Tilt
Measurement (Temperature)
Range	-40 ~ 125°C
Resolution	0.1°C
Measurement (GNSS Positioning (NB-IoT/Cat M Version Only))
Parameters	Longitude/Latitude
Resolution	0.000001
Wireless Transmission (LoRaWAN® Version)
Frequency	CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power	16 dBm (868 MHz)/20 dBm (915MHz)/19 dBm (470MHz)
Sensitivity	-137dBm @300bps
Mode	OTAA/ABP Class A
Wireless Transmission (NB-IoT/Cat M Version)
Cellular Band	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)
Application Mode	TCP/UDP/MQTT/AWS/Milesight IoT Cloud*
Operation
Power On & Off	NFC, Power Button (Internal)
Configuration	Mobile App (via NFC)
Physical Characteristics
Power Supply	2 x 9000 mAh ER26500 Li-SOCL** Batteries
Battery Life**	LoRaWAN® Version: > 10 years (10-min Interval, 25°C) NB-IoT/Cat M Version: TCP/UDP—Around 10 Years, MQTT/AWS—Around 5 Years (4 Times Report per Day, per Report Includes 12 Packages with 30-min Collection Interval, 25°C)***
Operating Temperature	- 30°C ~ 70°C
Relative Humidity	≤95% (non-condensing)
Ingress Protection	IP67
Dimension	118 × 65 × 80 mm
Material	ABS + PC (Flame Retardant)
Color	Black gray (C050/C100), Gray (W050/W100/S050)
Installation	On the Flat Surfaces with Screws

* Milesight IoT Cloud mode is under development. ** Tested under laboratory conditions and for guideline purposes only. *** PSM is required for SIM card and will be impacted by cellular base station signals.