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Milesight EM300 Environment Monitoring Sensor



LoRaWAN technology 915 MHz

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Temperature & Humidity Sensor

  • IP67 Waterproof
  • LoRaWAN® Wireless
  • 5/10 Years Battery Life
  • NFC for Configuring

High Sensitive Sensor

  • -30°C to 70°C
  • 0% to 100% RH

EM300-TH Adopts Sensirion industrial-grade digital temperature & humidity sensor, providing ±0.3℃ high accuracy of temperature and ±3% RH of humidity.


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

IP67 Waterproof

EM300-TH equipped with IP67 rated enclosure to fit into more application scenarios

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)


Tx Power20dBm (915) / 16dBm (868) / 17dBm (470)
Sensitivity-137dBm @300bps
ModeOTAA/ABP Class A
Temperature MeasurementRange-30°C to + 70°C
Accuracy0°C to + 70°C (±0.3°C), -30°C to 0°C (±0.6°C)
Humidity MeasurementRange0% to 100% RH
Accuracy10% to 90% RH (±3%), below 10% and above 90% RH(±5%)
Resolution0.5% RH
Physical CharacteristicsPower SupplyER18505 Li-SOCl2 4000 mAh battery (8000 mAh optional)
Battery Life≧ 5 years ( for 1 battery)
Operating Temperature-30°C to 70°C
Ingress ProtectionIP67
Dimension88 × 87 × 27 mm
MountingWall (screws or 3M adhesives)


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Milesight EM300 Environment Monitoring Sensor

Milesight EM300 Environment Monitoring Sensor

LoRaWAN technology 915 MHz

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