Milesight EM300-TH: Temperature & Humidity Sensor


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EM300-TH is a compact environment monitoring sensor for measurement of temperature and humidity and transmitting data using LoRaWAN® technology. With this low power consumption technology, EM300-TH can work up to 5 years with 4000 mAh battery. Combining with Milesight LoRaWAN® gateway and Milesight IoT Cloud solution, users can manage all sensor data
remotely and visually.
EM300-TH is widely used for both indoor and outdoor applications such as offices, hospitals, factories, greenhouses, etc.


Embedded with Sensirion high-precision sensor chip
Ultra-wide-distance transmission up to line of sight of 10km
IP67 UV-resistant and waterproof enclosure for harsh environment applications
Built-in 4000 mAh replaceable battery and works for 5 years without replacement
Equipped with NFC for easily configuration
Compliant with standard LoRaWAN® gateways and network servers
Quick and easy management with Milesight IoT Cloud solution


Wireless Transmission
Technology                 LoRaWAN®
Frequency                  CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923
Tx Power                    16dBm(868)/20dBm(915)/19dBm(470)
Sensitivity                  -137dBm @300bps
Mode                           OTAA/ABP Class A
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
Range                         0% to 100% RH
Accuracy                    10% to 90% RH (+/- 3%), below 10% and above 90% RH (+/- 5%)
Resolution                0.5% RH
Power On & Off        NFC, Power Button (Internal)
Configuration           NFC Configuration via Mobile App
Physical Characteristics
Power Supply            1 × 4000 mAh ER18505 Li-SOCL2 battery (extendable to 2 batteries)
Battery Life*             10 years (10 min interval)
Operating Temperature          -30°C to +70°C
Relative Humidity                   0% to 100% (non-condensing)
Ingress Protection                   IP67
Dimension                               88.5 × 85.3 × 27 mm (3.48 × 3.36 × 1.06 in)
Installation                              Wall Mounting
Regulatory                              CE, FCC, RoHS

* Tested under laboratory conditions and for guideline purposes only.

Additional information