EM400-UDL Ultrasonic Distance Sensor, as the versatile product among EM400 series, offering three versions – Standard, Pro, and Snow Level with varying 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 Ultrasonic Distance Sensor is the perfect fit for professional and demanding applications.

Non-Contact Distance
Measurement
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.
Great Flexibility with
Multiple Versions
EM400-UDL comes in three versions Standard, Pro and Snow Level versions with different probes optional. With 5 probes at choice, EM400-UDL provides great flexibility to satisfy various demands for professional applications.
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.
These two features extend the lifespan of the EM400-UDL and ensure that it continues to function reliably in harsh conditions.
NFC Configuration
Switching On/Off & Configuring the Devices Wirelessly
1st Step
Install the
Milesight ToolBox
2nd Step
Enable NFC and run ToolBox,
then attach your phone to the device
3rd Step
Verify the password
and start configuring
Features
- Selective probes vary from 25 to 1000 cm for multiple applications
- 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
- Built-in two 9000 mAh replaceable batteries and work for 10 years without replacement
- Ultra-wide-distance wireless transmission up to line of sight of 15 km
- Equipped with NFC for one touch configuration, support card emulation mode
- Function well with standard LoRaWAN® gateways and network servers
- Compatible with Milesight IoT Cloud
Specifications
Measurement
Distance
Range
Standard Version= C050: 25 ~ 500 cm C100: 25 ~ 1000 cm
Pro Version= W050: 30 ~ 500 cm W100: 50 ~ 1000 cm
Snow Version= S050: 50 ~ 500 cm
Accuracy
Standard Version= ± (1+0.3%*S) cm1, S=distance
Pro Version= ±1% FS
Snow Version= ±1% FS
Resolution 1 mm
Device Position
Status Normal/Tilt
Temperature
Range -40 ~ 125°C
Resolution 0.1°C
Wireless Transmission
Technology LoRaWAN®
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
Operation
Power On & Off NFC, Power Button (Internal)
Configuration Mobile App (via NFC)
Physical Characteristics
Power Supply 2 x 9000 mAh ER26500 Li-SOCL2 Batteries
Battery Life2 > 10 years
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
1. This accuracy is applicable to the measuring range of 25~800cm.
2. Tested under laboratory conditions and for guideline purposes only.
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