Membrane Leakage
Detection Sensor

Ensure Water Leak Protection for Every Square

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  • Sensitive Leak Detection with Membrane
  • IP67 Waterproof Rating for Durability
  • Data Storage and Retransmission
  • LoRaWAN® Connectivity for Reliable Communication
  • Milesight D2D Communication
  • Prolonged Performance: 10-Year Battery Life

Minimize Losses from Water Leaks

The EM300-MLD Membrane Leakage Detection Sensor, our newest addition to the water leak detection product line, features a 40 cm x 40 cm detection membrane, ensuring dependable monitoring of water leak, water spillage or floor wetness for both residential and commercial applications.


Secure Every Inch with Membrane Leakage Detection

Unlike rope or spot leak sensors, the EM300-MLD Membrane Leakage Detection Sensor offers a 40cm x 40cm membrane, enabling it to cover broader areas and effectively detect water leakage.

Durable and Convenient Membrane

Meeting Needs with Custom-Fit Membrane

The membrane of the EM300-MLD can be vertically trimmed to fit specific requirements. Also, it supports large-size customization (Contact Milesight).

Versatile Protection for Every Space

Designed to meet various needs, the EM300-MLD is suitable for both residential and commercial environments. Whether it's placed under appliances like washing machines and refrigerators or used to monitor floors, roofs and ceilings for potential water leak, water spillage or floor wetness conditions. This sensor provides comprehensive coverage and ensures timely notifications to prevent costly damages.

Robust Data Storage and Retransmission

The EM300-MLD stores up to 1,000 sets of historical data records locally. With data retrieval and retransmission support, it ensures data integrity even during occasional network downtime.

Comprehensive Water Leak Solution

Milesight offers both zone-based and spot-based leak detection options to suit various needs. Whether you require coverage for larger areas or pinpoint accuracy, we have the right products for you.

Ultra-Low Power Consumption

The EM300-MLD provides an operational lifespan of up to 10 years using a single battery, with the option to further extend it using two batteries.

LoRaWAN® Based

  • Penetrating Signals: data transmission range up to 2 km in urban areas and 15 km in rural areas
  • High Compatibility: compliant with standard LoRaWAN® gateways and network servers
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Milesight D2D Communication

Milesight D2D (Device to Device) communication protocol featuring LoRa® enables communication among different Milesight LoRaWAN® node devices without a LoRaWAN® gateway.

Lower Latency

Less than 1 Second
Response Time


Investment Cost

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Milesight D2D

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UC300 IoT Controller


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Learn More

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 and configuring the device via NFC technology from mobile phone or PC

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1st Step

Install the
Milesight ToolBox

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2nd Step

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

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3rd Step

Verify the password
and start configuring

Explore More About NFC Configuration >>


em300 mld membrane leakage detection sensor installation

Wall Mounting


Wireless Transmission
TechnologyLoRaWAN®, Milesight D2D
Tx Power16dBm(868 MHz)/20dBm(915 MHz)/19dBm(470 MHz)
Sensitivity-137dBm @300bps
ModeOTAA/ABP Class A
Leakage Detection
Liquid TypeConductive Liquid
Trigger Media400 × 400 × 0.25 mm Printed Leakage-Detecting Film
(The size can be customizable)
Trigger ConditionWhen the Sensing Film Contact Conductive Liquid
Power On & OffNFC, Power Button (Internal)
ConfigurationNFC Configuration via Mobile App
Advanced FeatureMilesight D2D Controller, Data Storage, Data Retransmission
Physical Characteristics
Cable Length1000 mm (Customizable)
Power Supply1 × 4000 mAh ER18505 Li-SOCL2 Battery (Extendable to 2 Batteries)
Battery Life*Up to 10 Years (One hour Leakage per Day, 25°C)
Operating Temperature-30°C~70°C
Relative Humidity0% to 95% (non-condensing)
Color & MaterialWhite Flame, ABS + PC (Retardant)
Ingress ProtectionIP67
Dimension105.6 × 85.3 × 27 mm (4.16 × 3.36 × 1.06 in)
InstallationWall Screw Mounting, 3M Tape Mounting, Cable-Tie Mounting

* Tested under laboratory conditions and for guideline purposes only.


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