0–5 m/s range
Cold Storage & Display Cases
For supermarket chillers, refrigerated display cases, cold storage deadzone detection, VAV terminals, and clean rooms.
S31B-FE
NB-IoT/LTE-M Temperature and Humidity Sensor
The Dragino S31B-FE is a Temperature and Humidity Sensor designed for Internet of Things (loT) applications. It accurately measures ambient temperature and relative humidity, and transmits the data to an loT server via LTE-M and NB-loT Networks. The sensing element used in the S31B-FE is a fully calibrated, digital temperature and humidity sensor from Sensirion, providing excellent reliability and long-term stability. S31B-FE has a 2.7" E-Ink display which can provide the reading for the environment status. S31B-FE use Nordic nrf9151 LTE-M modem, which has much less of power consumption and can work for years with. The device supports configurable temperature and humidity alarms, allowing users to receive instant notifications when readings exceed predefined thresholds. With built-in BLE configuration and wireless OTA firmware updates, the S31B-FE is simple to set up and maintain. S31B-FE has built-in 8000mAh high-capacity battery which can support for up to 5 years battery life. (depend on uplink interval)
Application guide
Choose the airflow range by deployment scenario
0–10 m/s range
HVAC Ducts & AHU Verification
For HVAC supply or extract ducts, filter pressure-drop monitoring, and air handling unit performance checks.
0–30 m/s range
Industrial Ventilation & Fan Outlets
For main duct airflow, fan outlets, compressed air systems, and industrial ventilation monitoring.
How it works
Remote airflow monitoring via LoRaWAN
Deploy AirFlow-LN at critical airflow points, transmit measurements through a LoRaWAN gateway, and use platform data to detect weak airflow, filter problems, or abnormal ventilation conditions earlier.
- AirFlow-LN measures airflow in ducts, refrigeration, or ventilation points.
- LoRaWAN gateway receives data from distributed sensors across the site.
- Cloud platform visualizes trends and helps trigger maintenance decisions.
Product inquiry
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