Dragino S31B-LE, LoRaWAN Temperature and Humidity Sensor with E-Ink Display, EU868

The Dragino S31B-LE measures air temperature and relative humidity and transmits the measurements via LoRaWAN. The difference from the S31B-LB is the integrated 2.7" E-Ink display: It displays the current measurements directly on the device, as well as signal strength, battery level, and connection status. A factory-calibrated Sensirion SHT31 serves as the sensor element, and the power supply is provided by an 8000-mAh Li-SOCl2 battery pack with a battery life of up to 5 years, depending on the transmission interval.

Main features:

• 2.7" E-Ink display for displaying temperature and humidity locally, switchable between °C and °F
• LoRaWAN 1.0.3, Class A, OTAA, freely configurable transmission interval (default 20 minutes)
• Configuration via Bluetooth 5.1 or via LoRaWAN downlink, firmware updates via OTA
• Threshold alarms for temperature and humidity as well as data logging: If no network is available, the measurements are stored locally and transmitted later
• 8000-mAh Li-SOCl2 battery pack (2 × ER18505), non-rechargeable

Specifications:

• Sensor: Sensirion SHT31, factory-calibrated
• Device measurement range: 0 to 50 °C (limited by the operating temperature range of the E-Ink display)
• Temperature: Accuracy ±0.2 °C, resolution 0.1 °C, long-term drift < 0.03 °C/year
• Relative humidity: 0 to 99.9 % RH, accuracy ±2 % RH, resolution 0.01 % RH, long-term drift < 0.25 % RH/year
• Display: 2.7" E-Ink
• Radio: LoRaWAN 1.0.3 Class A, EU868, max. +22 dBm, sensitivity down to −139 dBm
• Battery: 8000 mAh Li-SOCl2, self-discharge < 1 %/year at 25 °C
• Current consumption: 5 µA in sleep mode, 125 mA when transmitting at 20 dBm
• Operating temperature: 0 to 50 °C
• Scope of delivery: 1 × S31B-LE

Applications:

• Indoor climate monitoring in offices, schools, and commercial buildings, with measurement display directly on site
• Non-refrigerated warehouse and logistics areas, with alarms for threshold exceedance
• Laboratories, server rooms, and technical rooms
• Archives, museums, and storage rooms for moisture-sensitive goods

Documents:

• Manual