Outdoor Temperature and Humidity Sensor – Dragino S31B-NB NB-IoT

The Dragino S31B-NB is an NB-IoT temperature and humidity sensor designed for professional IoT deployments where environmental data needs to be transmitted reliably over cellular networks to an IoT platform. It measures ambient temperature and relative humidity accurately and is built for long-term outdoor operation with minimal maintenance.

At its core is a Sensirion SHT31 sensor, chosen for stable and reliable long-term measurement performance. The sensing element is mounted in a waterproof anti-condensation enclosure, making the device suitable for humid, changing, or weather-exposed environments. This makes the S31B-NB a practical choice for deployments where indoor-grade sensors or wired installations are not a good fit.

Typical use cases include greenhouses, barns, outdoor monitoring points, environmental and weather stations, technical infrastructure sites, storage zones, test plots, and other installations where temperature and humidity need to be tracked continuously. For operators, the built-in temperature and humidity alarm feature is especially useful, allowing threshold breaches to trigger alerts or automated actions in the IoT platform.

The S31B-NB supports multiple uplink methods including MQTT, MQTTs, TCP, and UDP, making it flexible for integration with different IoT servers and deployment architectures. This is useful for integrators and businesses that need to connect sensors into existing dashboards, alerting systems, or monitoring platforms. When paired with a Kilo Connectivity SIM card, the device can also be deployed globally in projects that require broad NB-IoT coverage across multiple regions.

With its 8500 mAh Li/SOCl2 battery, the S31B-NB is designed for long-term field use. It also supports BLE configuration, firmware updates, and periodic uplinks. For environmental monitoring, smart agriculture, technical supervision, and distributed IoT deployments, the S31B-NB is a reliable solution for wireless temperature and humidity monitoring over NB-IoT.