Milesight LoRaWAN Open/Close Multi-Sensor


The Milesight EM300-MCS is a compact magnet switch sensor with embedded temperature and humidity sensors for detecting the open/close status of objects (such as doors or windows).

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The Milesight EM300-MC magnetic contact switch sensor is ideal for those looking to secure premises. Designed to monitor the opening and closing of doors, this LoRaWAN® sensor can be used to:

  • Raise alerts to doors being opened in secure areas such as server rooms
  • Monitor the use of entrances and doorways
  • Maintain the security of unoccupied buildings

This smart sensor can be configured to raise automatic alerts when doors or windows are opened, enabling you to take further action if required.

For added functionality, the EM300-MC also features in-built temperature and humidity sensors enabling you to monitor the environmental conditions in your area.

Utilising LoRaWAN® technology, the EM300-MCS will transmit data to the connected LoRaWAN® gateway via a LoRaWAN® network. This data can then be visualised through the Milesight IoT Cloud or through your chosen third party platform.


  • Open/Close sensor with embedded temperarture and humidity sensors
  • Highly sensitive sensor with door and window security detection
  • Housed in an IP67 IV-resistant enclosure for installing in harsh environments
  • Built-in 4000 mAh replaceable battery can work continuously for up to 5 years
  • Equipped with NFC for simple configuration
  • Suitable for wall mounting



Available Frequency LoRaWAN: EU863

Temperature Sensor:

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

Humidity Sensor:

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

Physical Characteristics:

Transceiver Dimensions 105.6 x 85.3 x 27mm
Magnet Dimensions 32 x 15 x 8mm
Operating Temperature Range -30°C ~ 70°C
Relative Humidity 0% to 100% (non-condensing)
Casing IP67 Rated
Max Operating Distance Between Magnets 20 – 30mm
Cable Length 1.5m

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 you on the best LoRaWAN® Magnetic Contact Switch Sensor for your specific applications on an individual project basis.

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Additional information

Dimensions 105.6 × 85.3 × 27 mm



Environmental Protection

IP67 Rated

Measurements Taken

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Power Source




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