Temperature & humidity sensor Milesight EM300TH915M

The Milesight EM300TH915M Temperature & humidity sensor is a compact freestanding device for indoor and outdoor environmental monitoring. It measures temperature from -30°C to 70°C and relative humidity from 0% to 100% RH using a high-sensitivity Sensirion probe, and stores up to 2,800 historical data records on the device. The sensor features an IP67-rated enclosure for water and dust protection and supports NFC configuration and on/off control from a mobile phone or PC. Built for reliable data delivery, it supports retransmission to ensure the web server receives data even after temporary network outages.

Advantages

The sensor provides high accuracy (±0.3°C for temperature and ±3% RH for humidity) and a long battery life enabled by a 4000 mAh power source. IP67 protection allows use in a wide range of environments, while onboard storage of 2,800 records preserves traceability because stored data cannot be manually deleted. Retransmission capability increases communication reliability, and NFC-based configuration simplifies setup and operation.

Suitable for

• Indoor environmental monitoring in offices, server rooms, and laboratories
• Outdoor monitoring in sheltered or exposed locations where IP67 protection is required
• Cold chain monitoring and storage areas requiring temperature and humidity tracking
• Industrial and agricultural applications that need robust, reliable data logging

Key specifications

• Model: Milesight EM300TH915M
• Temperature range: -30°C to 70°C
• Humidity range: 0% to 100% RH
• Accuracy: ±0.3°C (temperature), ±3% RH (humidity)
• Protection rating: IP67
• Storage capacity: 2,800 historical records (non-deletable)
• Power: 4000 mAh battery (up to 5 years typical life)
• Dimensions: 88 mm × 87 mm × 27 mm
• Configuration: NFC via mobile phone or PC
• Communication reliability: supports data retransmission

How to use

Place the EM300TH915M sensor in the desired indoor or outdoor location, ensuring the IP67 enclosure and mounting position suit the environment. Configure the device settings and switch it on or off using NFC from a compatible mobile phone or PC. After installation, monitor readings via your Milesight-compatible gateway or web server; the device will store up to 2,800 records locally and retransmit data to the server when network conditions allow.

Recommendations

Install the sensor away from direct heat sources, strong drafts, or direct sunlight to ensure accurate temperature and humidity readings. For outdoor use, mount in a sheltered position if possible while maintaining exposure to ambient air. Regularly check battery status and back up server-stored data to maintain long-term traceability.