Milesight EM300 Water Leak Detection Sensors


Prevent damage to your assets with Milesight’s Leak Detection Sensor.

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Prevent water damage with the Milesight EM300-SLD/ZLD water leak sensors.

Offering a reliable performance to detect presence of water or other liquids, these leak detection sensors are available in two different variants to suit your installation environments. The EM300-SLD water leak sensor has a probe attachment, whereas the EM300-ZLD is a rope sensor.

Ideal for applications such as hospitals, warehouses and server rooms, using LoRaWAN® to detect water leaks can help to prevent costly damages to your premises and equipment.


  • Detect the presence of liquids by a small water probe or rope detection sensor
  • Embedded with temperature and humidity sensors for added environmental monitoring
  • IP67 rated waterproof casing, suitable for use in harsh environments
  • Built-in 4000 mAh replaceable battery which provides up to 5 years battery life
  • Equipped with NFC for easy configuration

We can supply third-party online wireless sensor monitoring and notification system to view data and set alerts via SMS text and email.

Ask us about our zero-touch provisioning service, this sensor can be supplied pre-configured and ready to go.



Input Power 1 × 4000 mAh ER18505 Li-SOCL2 battery (extendable to 2 batteries)
Battery Life Time Up to 5 years

Measurement (Leak Detection):

Trigger Condition When liquid level reaches 5mm
Cable Length 1.5m (customisable)

Measurement (Temperature):

Range -30°C to 70°C
Accuracy 0°C to 70°C (+/- 0.3°C), -30°C to 0°C (+/- 0.6°C)
Resolution 0.1°C

Measurement (Humidity):

Range 0% to 100% RH
Accuracy 10% to 90% RH (+/-3%), below 10% and above 90% RH (+/- 5%)
Resolution 0.5% RH

Key documents & information

Discounted Trade Pricing: Contact us for trade pricing, to place an order or to discuss your IoT projects.

All of our products are available to customers throughout Europe. For more information on shipping costs, currency conversions and lead times, please contact our technical team.

Our technical team are also happy to advise customers on the best LoRaWAN® water leak sensors for their specific applications on an individual project basis.

Discount trade prices available
Speak to the team

Additional information

Weight N/A
Dimensions 105.6 × 85.3 × 27 mm



Environmental Protection

IP67 Rated

Measurements Taken

, ,

Power Source




Sensor Type

EM300-SLD, EM300-ZLD

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