Cellular Temperature & Humidity Sensor – 3m SHT31, Long-Life Battery

The S31-NB Battery-Powered NB-IoT / LTE-M Temperature & Humidity Sensor is designed for long-range, ultra-low-maintenance environmental monitoring across agriculture, smart buildings, industrial processes, irrigation systems, and remote environmental stations.

Using Australia’s NB-IoT and LTE-M (Cat-M1) cellular networks (Telstra, Optus, Vodafone), this sensor provides reliable long-distance communication without requiring LoRaWAN gateways, Wi-Fi networks, or onsite infrastructure.

The device features the high-precision Sensirion SHT31 digital temperature and humidity sensor, providing:

• Temperature: –40°C to +80°C (±0.2°C accuracy)

• Humidity: 0–99.9% RH (±2% RH accuracy)

The sensor is housed in a waterproof, anti-condensation casing for reliable long-term outdoor use. The electronics are protected in a rugged IP66-rated enclosure suitable for extreme Australian conditions.

Powered by a long-life 8500mAh Li-SOCl₂ industrial battery, this NB-IoT/LTE-M model offers multi-year autonomous operation, making it ideal for remote, off-grid, and hard-to-reach locations.

The sensor includes BLE mobile configuration, OTA firmware updates, configurable temperature & humidity alarms, and on-device datalogging, ensuring measurements are stored and transmitted even if the network is temporarily unavailable.

The S31-NB integrates seamlessly with ProSight Monitoring Software, enabling real-time dashboards, alerts, history charts, reporting, and multi-site visibility.
For custom solutions, it also integrates easily with third-party IoT and SCADA platforms via MQTT, HTTP, or UDP payloads.

ProSense stocks this unit in Australia, ensuring fast delivery and local technical support.

Key Features

• NB-IoT / LTE-M (Cat-M1) cellular connectivity

• High-accuracy Sensirion SHT31 temperature & humidity sensor

• Temperature: –40°C to +80°C (±0.2°C)

• Humidity: 0–99.9% RH (±2% RH)

• Long-life 8500mAh Li-SOCl₂ battery

• IP66 outdoor-rated waterproof enclosure

• BLE v5.1 configuration

• OTA firmware updates

• High/low temperature & humidity alarms

• Datalogging for offline use

• Ultra-low-power architecture

• Compatible with ProSight Software

• Integrates with custom IoT/SCADA platforms (MQTT/HTTP/UDP)

• ProSense stocks in Australia