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Milesight EM300-MCS - Magnetic contact switch sensor (door/gate contact)

Original price £65.00 - Original price £65.00
Original price
£65.00 - £65.00
Current price £65.00
SKU EM300-MCS-868M

Magnet contact switch sensor that can be used for monitoring doors, windows and gates.

Applications include monitor door open/close events, window open/close events but also farm gate monitoring (i.e. gates left open).

The EM300 is rated to IP67 and is both UV and water resistant, perfect for use in harsh environments, but equally suitable for indoor use.

The EM300 has a built-in 4000mAh battery boasting a 5-year battery life. The device is a LoRaWAN IoT sensor with a range of up to 10KM in optimal conditions.

Product details
  • Magnet contact sensor
  • Temperature
  • Humidity
  • LoRaWAN Radio
  • EU868MHz (For UK/EU markets)
  • Tx Power: 16dBm(868)/20dBm(915)/19dBm(470)
  • Sensitivity: -147dBm @ 300bps
  • Mode: OTAA/ABP Class A
  • Other frequencies available (CN470/RU864/IN865/EU868/US915/AU915/KR920/AS923)


  • Battery: 1 x 4000mAh ER18505 Li-SOCL2 battery (extendable to 2 batteries)
  • Battery-Life: 5 years (10min interval, 1 x alarm, SF10)
  • Dimensions: 105.6 × 85.3 × 27 mm (4.16 × 3.36 × 1.06 in)
  • Installation: Wall mounting
  • Protection: IP67
  • NFC support and USB Type-C port for programming

Sensor specification


  • Range: -20°C to +70°C
  • Accuracy: 0°C to + 70°C (+/- 0.3°C), -20°C to 0°C (+/- 0.6°C)
  • Resolution: 0.1°C


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

Contact sensor

  • Detection distance: 20-30mm
  • Cable length: 1.5m


  • Door open/close events
  • Window open/close events
  • Cupboard open/close events
  • Farmers gates open/close events and being left open. Safeguard livestock.


The sensors use a LoRaWAN radio network so you need to ensure your building is covered by a LoRaWAN network. MTG also sell LoRaWAN gateways here, or you can talk to us about our LoRaWAN network services.


Using the Milesight IoT Cloud solution, users can view and manage sensor data, create riggers and receive alerts/notifications by e-mail and a mobile app.