EM300-MCS Magnetic Contact Switch

EM300-MCS Magnetic Contact Switch
Magnetic Contact Switch

  • Security Alarm for Door Opening
  • IP67 Waterproof
  • LoRaWAN® Wireless
  • 5/10 Years Battery Life
  • NFC for Configuring



EM300-MCS Magnetic Contact Switch EM300-MCS Magnetic Contact Switch EM300-MCS Magnetic Contact Switch

Alarming for Unauthorized Entry

The EM300-MCS magnetic contact switch can be mounted to any door or window to detect an opening or closing event. It adds physical security monitoring to your location by alarming for intrusion or unauthorized entry to your monitored conditions.

Temperature & Humidity Monitoring

  • -30°C to 70°C
  • 0% to 100% RH

EM300-MCS built-in Sensirion industrial-grade digital sensor, providing ±0.3℃ high accuracy of temperature and ±3% RH of humidity

    IP67 Waterproof

    Equipped with IP67 rated enclosure to fit into more application scenarios
    Dustproof and Waterproof
    Industrial Grade Design



    1. EM300-MCS compatible with industry-standard LoRaWAN® gateways
    2. With a range of up to 15 km in rural areas and 2 km in urban areas


    Ultra Low Power Consumption

    Easily replaceable battery with up to 10 years service life

    • ER18505 4000 mAh Li-SOCl2 Battery
    • Dual Battery Holders (One Battery by Default)


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

    1st Step
    Install the Milesight ToolBox (Android/iOS).

    2st Step
    Enable NFC and run ToolBox,
    attach your phone to the device.

    3st Step
    Verify the password and start configuring.


    Milesight IoT Cloud

    • Monitoring door/window status to alarm unauthorized entry
    • Remote monitoring of temperature and humidity with a phone
    • Collaborative interaction with a variety of Milesight sensors
    • Android & iOS versions allow you to manage devices at your fingertips



    It can be applied to various scenes of anti-location.

    EM300-MCS Magnetic Contact Switch

      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
      Sensing Lead Cable 1007UL #22AWG 260mm
      Type Normally closed
      Distance of magnets 20-30mm
      Distance of holes 22mm
      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 ER18505 Li-SOCl2 4000 mAh (8000 mAh optional)
      Battery Life ≧ 5 years ( for 1 battery)
      Operating Temperature -40°C to 70°C
      Ingress Protection IP67
      Dimension 88 × 87 × 27 mm
      Mounting Wall (screws or 3M adhesives)