Spot Leak Detection Sensor



Zone Leak Detection Sensor


Prevent Water Damage

Through instant water leak detection, the EM300-SLD/ZLD will help prevent potential water damage to properties or assets.

Temperature & Humidity Monitoring

spot-30°C to 70°C

spot0% to 100% RH

Adopts Sensirion industrial-grade digital sensor, providing ±0.3℃
high accuracy of temperature and ±3% RH of humidity


1Compatible with industry standard LoRaWAN® gateways

2With a range of up to 15 km in rural areas and 2 km in urban areas


IP67 Waterproof

Equipped with IP67 rated enclosure to fit into more application scenarios

Dustproof and waterproof
industrial grade design


Flooding monitoring Timely warning

When the water level at the detection point reaches 0.5mm, the flood sensor will report a dangerous situation.
Notify the administrator via email or APP to discover danger in time and reduce losses.

Ultra Low Power Consumption

Easily replaceable battery with up to 10 years service life

spotER18505 4000 mAh Li-SOCl2 Battery

spotDual Battery Holders (One Battery by Default)


Easy to Use

Switching on/off and configuring the device via NFC technology from mobile phone or PC

step-11st Step
Install the Milesight ToolBox (Android/iOS).

step-22nd Step
Enable NFC and run ToolBox,
attach your phone to the device.

step-33rd Step
Verify the password and start configuring.


Milesight IoT Cloud

spotPreventing potential water damage to properties or assets

spotRemote monitoring of temperature and humidity with a phone

spotCollaborative interaction with a variety of Milesight sensors

spotAndroid & iOS versions allow you to manage devices at your fingertips




LoRaWAN® Frequency CN470/RU864/IN865/EU868/US915/AU915/KR920/AS923
Tx Power 17dBm (470) / 16dBm (868) / 20dBm (915)
Sensitivity -137dBm @300bps
Mode OTAA/ABP Class A
Leak Detection Type EM300-SLD: probe, spot detection
EM300-ZLD: rope, zone detection
Cable Length EM300-SLD: 1.5 m
EM300-ZLD: 3 m
(Optional cable lengths of hundred meters available)
Temperature Measuring Range -30°C to+70°C
Accuracy 0~70°C: ±0.3°C
-30~0°C: ±0.6°C
Resolution 0.1°C
Humidity Measuring Range 0%~100% RH
Accuracy ±3% (10~90%RH)
±5% (Other ranges)
Resolution 0.10%
Physical Characteristics Power Supply 18505 Li-SOCL12 4000mA ( 8000mA optional)
Battery Life ≧ 5 years ( for 1 battery)
Operating Temperature -30°C to 70°C
Ingress Protection IP67
Dimension 88 × 87 × 27 mm
Mounting Wall (screws or 3M adhesives)



Temperature & Humidity Sensor



Magnetic Contact Switch

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