Multifunctional Ultrasonic Distance Sensor

Flexible, Reliable and Durable


Cat M

em400 mud image 1 small
em400 mud image 2 small
em400 mud image 3 small
  • Three Pre-set Modes for Seamless User Experience
    Standard Mode/Parking Lot Mode (LoRaWAN® version)/Bin Mode
  • Ultrasonic Distance Detection with Small Blind Spots
  • 3-in-1 Sensor for Powerful Performance
  • Long-Lasting Battery Life of up to 10 Years
  • Rugged and Reliable IP67 Rated Enclosure
  • Positioning Function Enabled by GNSS Modules
    (NB-loT version)
  • LoRaWAN® & NB-IoT & CAT M Versions Available

EM400-MUD is a versatile device among EM400 series, that is equipped with multiple application modes catering to a variety of scenarios such as smart waste management, smart parking and other distance / level measurement applications. EM400-MUD constitutes a powerful solution with its various modes, extended battery life, and robust build, providing a cost-effective and reliable option to enhance efficiency.

Explore Distance/Level Sensors

Get to Know Our Powerful and Versatile EM400 Series

(LoRaWAN® Version)


LoRaWAN® & NB-IoT &
CAT M Versions Available

For flexible and broad applications, LoRaWAN®, NB-IoT and CAT M versions are available.

*Cellular band:
Cat M1:
Cat NB2:
B1/B2/B3/B4/B5/B8/ B12/B13/B18/B19/B20/B25/B28/B66/B71/B85

LoRaWAN® Version

  • Wide Area Coverage: Data transmission range up to 2 km in urban areas and 15 km in rural areas
  • Power Saving: Low battery consumption enabled by LoRaWAN® technology
  • More Deployment Freedom: Deployment options based on both private and public network facilities

NB-IoT & CAT M Versions Available

  • Stable Transmission: Reliable data transmission via cellular base stations
  • Positioning Capability: Equipped with GNSS module to help track your assets
  • Low Deployment Cost: Low deployment cost due to the presence of existing cellular base stations
  • Cumulative Reporting: Accumulate up to 24 data packets in each report, saving transmission cost and power consumption

Cat M

Small Blind Spot Ultrasonic Distance Detection

The EM400-MUD uses ultrasonic distance detection which allows for more precise distance measurement and small blind spot. Its precise measurements make it an ideal device for a range of applications, from garbage bin monitoring to parking lot management.

em400 mud smart parking

EM400-MUD detects parking space occupancy using high-frequency sound waves for timely reports of incoming and outgoing vehicles, ensuring that the parking space occupancy status is up-to-date and reliable.

With integration with cloud platform, EM400- MUD provides a seamless and hassle-free parking experiences for drivers, as well as enables parking lot managers to analyze and optimize parking operations for higher efficiency.

*Parking Mode is available on LoRaWAN® version only.

em400 mud smart waste

EM400-MUD also supports fill level monitoring for medium or large trash containers, like commonly seen municipal trash cans. With ultrasonic sensor to detect overflowing garbage, built-in 3-axis accelerometer to detect the status of the garbage bin lid, and built-in NTC thermistor to detect trash combustion, EM400-MUD is the ideal solution for smart waste management, providing a long-lasting performance that customers can rely on.

em400 mud common distance measurement

With the feature of small size and non-contact detection, EM400-MUD also supports other distance / level measurement applications, such as waste water management, fill level monitoring in grains or fertilizer, providing great flexibility.

Versatile Applications

Pre-set Modes for Better User Experience

EM400-MUD comes equipped with THREE pre-set modes, namely the Standard Mode, Bin Mode, and Parking Lot Mode, These modes are configured with different data collection and report intervals to ensure optimal performance. With these ready-to-use modes available, users can integrate EM400-MUD into monitoring solutions quickly.

Rugged and Reliable IP67 Rated Enclosure

IP67 rated enclosure ensures EM400-MUD is protected against dust, water, and other environmental hazards, enabling it to withstand harsh environment.

EM400-MUD 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-MUD is equipped with high-capacity and easily-replaceable batteries. The conditions of battery life are specified below:

  • LoRaWAN® Version:

Standard mode: Over 10 years (10-min interval, 25°C)
Bin mode: Over 10 years (20-min interval, 25°C)
Parking lot mode: 5 years (12 triggers per day, 25°C)

  • NB/Cat.M Version:

Over 10 years (10-min interval, 25°C) 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

NFC Configuration

Switching On/Off & Configuring the Devices Wirelessly

em400 mud configuration 1

1st Step

Install the
Milesight ToolBox

em400 mud configuration 2

2nd Step

Enable NFC and run ToolBox,
then attach your phone to the device

em400 mud configuration 3

3rd Step

Verify the password
and start configuring

Explore More About NFC Configuration >>


Screw Mounting


Wireless Transmission
LoRaWAN® Version
Tx Power16 dBm (868 MHz)/20 dBm (915MHz)/19 dBm (470MHz)
Sensitivity-137dBm @300bps
ModeOTAA/ABP Class A
NB-IoT/Cat M Version
Cellular BandCat 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/
SIM Slot1 (Micro SIM-3FF)
Application ModeTCP/UDP/MQTT/AWS/Milesight IoT Cloud1
Detection Range3 ~ 450 cm
Detection Accuracy± (1+0.3%*S) cm, S=distance(-15°C ~ 60°C)
Detection Resolution1 mm
Device Position
Range-40 ~ 125°C
GNSS Positioning (NB-IoT/Cat M Version Only)
Power On & OffNFC, Power Button (Internal)
ConfigurationMobile App (via NFC)
Physical Characteristics
Power Supply2 x 9000 mAh ER26500 Li-SOCL2 Batteries
Battery Life2LoRaWAN® Version:
Standard mode: > 10 years (10 min interval, 25°C)
Bin mode: > 10 years (20 min interval, 25°C)
Parking lot mode: 5 years (12 triggers per day, 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)3
Operating Temperature- 30°C ~ 70°C
Relative Humidity≤95% (non-condensing)
Ingress ProtectionIP67
Dimension118 × 65 × 32.5 mm
Material & ColorABS + PC (Flame Retardant), Black gray
InstallationOn the Flat Surfaces with Screws

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


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