Milesight EM300 Series Environmental Monitoring Sensor User Manual

User manual for Milesight EM300 environmental monitoring sensors covering setup, configuration, safety, and cloud management.

Brand: Milesight
Document type: User Manual
Language: Chinese
Pages: 17
File format: PDF
File size: 1.4 MB
Published: 28 September, 2026
Updated: 28 September, 2026
MD5 checksum: 100AA56CC4233CD171F7C8D91631E5EB
PDF: Milesight EM300 Series Environmental Monitoring Sensor User Manual PDF

About this manual

The EM300 series includes temperature‑humidity, door‑magnet, and leak‑detection sensors designed for outdoor use. They feature an IP67 waterproof housing, low‑power operation with large 4000/8000 mAh batteries, and support LoRaWAN and NB‑IoT connectivity.

The manual provides safety guidelines, hardware overview, NFC and LoRaWAN configuration steps, data communication protocol details, and instructions for managing devices via the Milesight Cloud platform. This manual is written in Chinese.

What's inside

Product Introduction
Product Structure
Product Configuration
Product Installation
Data Communication Protocol
Milesight Cloud Management
Safety Information
Maintenance and Firmware Upgrade

Specifications

Protection rating	IP67
Maximum communication distance (open environment)	11 km
Battery capacity	4000 mAh / 8000 mAh
Battery life	5+ years
Default password	123456
Factory reset method	Long press power button >10 s
Supported temperature unit	Celsius only
LoRaWAN Device EUI	Unique identifier on product label
Firmware version example	V1.14

Frequently asked questions

What is the default password for the EM300 sensors?

The default password is 123456.

How do I reset the EM300 device to factory settings?

Long press the power button for more than 10 seconds.

What is the maximum communication distance in open environments?

The sensor can communicate up to 11 km in open areas.

What protection rating does the EM300 series have?

It is rated IP67 for water and dust protection.

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