EM300-TH Temperature & Humidity Sensor

Milesight EM300-TH LoRaWAN® Temperature & Humidity Sensor

The EM300-TH is a compact, durable LoRaWAN® sensor designed for long-term temperature and humidity monitoring. Ideal for indoor and outdoor environments, this sensor enables remote data collection and management via LoRaWAN® networks and Milesight IoT Cloud.

• Temperature Range: -30°C to +70°C
• Humidity Range: 0% to 100% RH
• High Accuracy: ±0.3°C, ±3% RH in standard conditions
• IP67 Waterproof & Dustproof
• Shock-Resistant and Vibration-Resistant
• Ultra-Low Power Consumption – Up to 5+ years on a single 4000 mAh battery
• Optional 8000 mAh Battery Model Available
• NFC Configuration for Easy Setup
• Flexible Installation: Screw or 3M adhesive mount

Applications

Perfect for use in offices, hospitals, greenhouses, warehouses, factories, and environmental monitoring projects where reliable, wireless sensing is essential.

Technical Specifications

• LoRaWAN® Frequency: CN470/RU864/IN865/EU868/US915/AU915/KR920/AS923
• Tx Power: 20 dBm (915 MHz) / 16 dBm (868 MHz) / 17 dBm (470 MHz)
• Sensitivity: -147 dBm @ 300 bps
• Mode: OTAA/ABP Class A

Temperature Measurement

• Range: -30°C to +70°C
• Accuracy: ±0.3°C (0°C to +70°C), ±0.6°C (-30°C to 0°C)
• Resolution: 0.1°C

Humidity Measurement

• Range: 0% to 100% RH
• Accuracy: ±3% (10% to 90% RH), ±5% (below 10% or above 90%)
• Resolution: 0.5% RH

Physical Characteristics

• Power Supply: ER18505 Li-SOCl2 4000 mAh battery (8000 mAh optional)
• Battery Life: ? 5 years (with 4000 mAh battery)
• Operating Temperature: -30°C to +70°C
• Ingress Protection: IP67
• Dimensions: 88 × 87 × 27 mm
• Mounting: Wall mounting with screws or 3M adhesives

Documentation:

EM300 Series User Guide

EM300-TH Datasheet