High Sensitive Sensor

spot-30°C to 70°C

spot0% 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


1EM300-TH compatible with industry-standard LoRaWAN® gateways

2With a range of up to 15 km in rural areas and 2 km in urban areas

EM300-TH Product

IP67 Waterproof

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

Dustproof and waterproof
industrial grade design

EM300-TH Product

Ultra Low Power Consumption

Easily replaceable battery with up to 10 years service life

spotER18505 4000 mAh Li-SOCl2 Battery

spotDual Battery Holders (One Battery by Default)

EM300-TH Battery

Easy to Use

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

step-11st Step
Install the Milesight ToolBox (Android/iOS).

step-22nd Step
Enable NFC and run ToolBox,
attach your phone to the device.

step-33rd Step
Verify the password and start configuring.


Milesight IoT Cloud

spotRemote monitoring of temperature and humidity with a phone

spotInteractive collaboration with a variety of Milesight sensors

spotAndroid & iOS versions allows you to manage devices at your fingertips


EM300-TH Residence


EM300-TH in Office




EM300-TH for warehouse


EM300-TH for greenhouse



Cold Chain

EM300-TH for food

Food Preservation


LoRaWAN® Frequency CN470/RU864/IN865/EU868/US915/AU915/KR920/AS923
Tx Power 20dBm (915) / 16dBm (868) / 17dBm (470)
Sensitivity -147dBm @300bps
Mode OTAA/ABP Class A
Temperature Measurement 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 Measurement Range 0% to 100% RH
Accuracy 10% to 90% RH (±3%), below 10% and above 90% RH(±5%)
Resolution 0.5% RH
Physical Characteristics Power Supply ER18505 Li-SOCl2 4000 mAh battery (8000 mAh optional)
Battery Life ≧ 5 years ( for 1 battery)
Operating Temperature -30°C to 70°C
Ingress Protection IP67
Dimension 88 × 87 × 27 mm
Mounting Wall (screws or 3M adhesives)

EM300-TH Temperature Humidity Sensor


Leak Detection Sensor

EM300-TH Temperature Humidity Sensor


Magnetic Contact Switch

    Country CodeBusiness Type


    Ordering Info