{"id":31445,"date":"2026-04-30T16:22:55","date_gmt":"2026-04-30T14:22:55","guid":{"rendered":"https:\/\/monraspberry.com\/?post_type=product&p=31445"},"modified":"2026-10-26T05:09:32","modified_gmt":"2026-10-26T04:09:32","slug":"dragino-s31b-outdoor-temperature-and-humidity-sensor-lorawan","status":"publish","type":"product","link":"https:\/\/monraspberry.com\/en\/produit\/dragino-s31b-capteur-de-temperature-et-humidite-exterieur-lorawan\/","title":{"rendered":"Dragino S31B: outdoor LoRaWAN temperature and humidity sensor"},"content":{"rendered":"

Dragino S31B LoRaWAN: all-in-one outdoor temperature and humidity sensor<\/h2>\n

The Dragino S31B LoRaWAN<\/strong> is an outdoor temperature and humidity<\/strong> sensor, waterproof to IP66<\/strong>, designed for long-range IoT<\/strong> with long range. An evolution of the S31, it integrates directly in its housing<\/strong> the renowned Sensirion SHT31<\/strong> sensor, fully calibrated, linearized and temperature-compensated, with no remote probe to install.<\/p>\n

With a measuring range of -40 \u00b0C to +80 \u00b0C<\/strong>, an accuracy of \u00b10.2 \u00b0C<\/strong> and \u00b12 %RH<\/strong>, the S31B transmits its readings via the LoRaWAN<\/strong> protocol to your gateway and IoT platform (TTN, ChirpStack, Actility, Helium, etc.). Available in three LoRaWAN versions: S31B-LB (8,500 mAh)<\/strong>, S31B-LB2 (19,000 mAh)<\/strong> and S31B-LS (solar)<\/strong> , it is perfectly suited to smart agriculture, connected buildings, greenhouses, laboratories and the supply chain.<\/p>\n

Key features of the Dragino S31B LoRaWAN<\/h2>\n
    \n
  • Sensor Sensirion SHT31<\/strong> built in: calibrated, linearized and compensated<\/li>\n
  • Measuring range: -40 \u00b0C to +80 \u00b0C<\/strong> \/ 0 - 99.9 %RH<\/strong><\/li>\n
  • Outstanding accuracy: \u00b10.2 \u00b0C<\/strong> and \u00b12 %RH<\/strong><\/li>\n
  • Fine resolution: 0.01 \u00b0C<\/strong> and 0.01 %RH<\/strong><\/li>\n
  • Very low long-term drift: < 0.03 \u00b0C\/year<\/strong> and < 0.25 %RH\/year<\/strong><\/li>\n
  • Wireless configuration via Bluetooth Low Energy (BLE)<\/strong> from a smartphone<\/li>\n
  • OTA updates<\/strong> performed remotely for easier maintenance<\/li>\n
  • Temperature and humidity alarms<\/strong> (configurable)<\/li>\n
  • Housing IP66 waterproof and anti-condensation<\/strong> specially designed for outdoor use<\/li>\n
  • Ultra-low power consumption<\/strong> : 5 \u00b5A in standby \u2192 multi-year battery life<\/li>\n
  • Configurable periodic uplink<\/li>\n<\/ul>\n

    Available LoRaWAN versions<\/h2>\n
      \n
    • S31B-LB<\/strong> : non-rechargeable Li\/SOCl\u2082 battery 8,500 mAh<\/strong> : versatile and cost-effective<\/li>\n
    • S31B-LB2<\/strong> : non-rechargeable Li\/SOCl\u2082 battery 19,000 mAh<\/strong> : maximum battery life, ideal for remote sites<\/li>\n
    • S31B-LS<\/strong> - Solar panel<\/strong> + 3,000 mAh rechargeable Li-ion battery, virtually unlimited operation outdoors in sunny conditions<\/li>\n<\/ul>\n

      Technical specifications<\/h2>\n
        \n
      • Brand:<\/strong> Dragino<\/li>\n
      • Models:<\/strong> S31B-LB \/ S31B-LB2 \/ S31B-LS<\/li>\n
      • Sensor:<\/strong> Sensirion SHT31 built into the housing<\/li>\n
      • Temperature measurement:<\/strong> -40 to +80 \u00b0C, accuracy \u00b10.2 \u00b0C @ 0-90 \u00b0C, resolution 0.01 \u00b0C, drift < 0.03 \u00b0C\/year<\/li>\n
      • Humidity measurement:<\/strong> 0 to 99.9 %RH, accuracy \u00b12 %RH, resolution 0.01 %RH, drift < 0.25 %RH\/year<\/li>\n
      • Configuration:<\/strong> Bluetooth Low Energy (BLE) + OTA update<\/li>\n
      • Operating temperature :<\/strong> -40 \u00b0C to +85 \u00b0C<\/li>\n
      • Protection rating:<\/strong> IP66 anti-condensation<\/li>\n
      • LoRa specifications:<\/strong>\n
          \n
        • HF band: 862-1020 MHz<\/li>\n
        • Max RF output power: +22 dBm<\/strong><\/li>\n
        • RX sensitivity: down to -139 dBm<\/strong><\/li>\n
        • Excellent anti-blocking immunity<\/li>\n<\/ul>\n<\/li>\n
        • S31B-LB \/ S31B-LB2 power supply:<\/strong> non-rechargeable Li\/SOCl\u2082 battery 8,500 \/ 19,000 mAh, self-discharge < 1 %\/an @25 \u00b0C, courant max continu 130 mA, courant de boost 2 A pendant 1 s<\/li>\n
        • S31B-LS power supply:<\/strong> solar panel + 3,000 mAh rechargeable Li-ion battery<\/li>\n
        • Power consumption:<\/strong>\n
            \n
          • Standby: 5 \u00b5A @ 3.3 V<\/strong><\/li>\n
          • LoRa transmission: 125 mA @ 20 dBm, 82 mA @ 14 dBm<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

            S31 or S31B: what is the difference?<\/h2>\n

            The S31<\/strong> and the S31B<\/strong> share the same sensor Sensirion SHT31<\/strong> and the same measurement performance. The main difference lies in the Design<\/strong> :<\/p>\n

              \n
            • S31<\/strong> : sensor on a 3-meter cable, ideal when the measurement must be taken away from the electronics housing<\/li>\n
            • S31B<\/strong> : sensor built directly into the housing, plus BLE configuration<\/strong> and OTA updates<\/strong> , for faster commissioning<\/li>\n<\/ul>\n

              Choose the S31B<\/strong> for a simple, all-in-one installation, or the S31<\/strong> if you need to position the probe precisely at a distance.<\/p>\n

              Why choose LoRaWAN for your temperature and humidity sensors?<\/h2>\n

              LoRaWAN technology LoRaWAN<\/strong> offers a range of up to several kilometers in open areas, with no operator subscription. It is the ideal solution for farms, greenhouses, campuses, private industrial sites, municipalities and large infrastructures, where you can deploy your own LoRaWAN gateway. With its very low data rate and minimal power consumption, the S31B can send its readings for several years<\/strong> on a single battery.<\/p>\n

              Applications<\/h2>\n
                \n
              • Smart agriculture & greenhouses<\/strong> : crop temperature and humidity monitoring<\/li>\n
              • Connected buildings & home automation<\/strong> : HVAC, BMS, zone monitoring<\/li>\n
              • Supply chain & cold chain<\/strong> : warehouses, fridges, sensitive stock<\/li>\n
              • Laboratories<\/strong> : regulatory environmental monitoring (HACCP, GxP)<\/li>\n
              • Smart cities<\/strong> : street furniture, local weather, urban monitoring<\/li>\n
              • Server rooms & data centers<\/strong> : continuous temperature \/ humidity monitoring<\/li>\n
              • Heritage & museums<\/strong> : preventive conservation of artworks and archives<\/li>\n<\/ul>\n

                Frequently asked questions (FAQ)<\/h2>\n

                What is the battery life of the S31B LoRaWAN?<\/h3>\n

                Depending on the uplink frequency and the version, battery life can reach several years<\/strong>, especially with the 19,000 mAh battery (S31B-LB2). The solar-powered S31B-LS offers virtually unlimited operating time as long as there is enough sunlight.<\/p>\n

                Which version should I choose: LB, LB2 or LS?<\/h3>\n

                S31B-LB<\/strong> : best battery life\/price ratio, perfect for most installations. S31B-LB2<\/strong> : maximum battery life thanks to the 19,000 mAh battery, ideal for hard-to-reach sites. S31B-LS<\/strong> : the battery-maintenance-free solution, recommended outdoors in sunny locations for continuous operation.<\/p>\n

                How is the S31B configured?<\/h3>\n

                The S31B is very easy to configure via Bluetooth Low Energy (BLE)<\/strong> from a smartphone, with no cable or serial interface. Software updates can then be deployed remotely via OTA<\/strong>.<\/p>\n

                Do I need a LoRaWAN gateway to use the S31B?<\/h3>\n

                Yes. The S31B transmits its data via a compatible LoRaWAN gateway (Dragino, Multitech, Kerlink, etc.) connected to a LoRaWAN network server such as The Things Network (TTN)<\/strong>, ChirpStack<\/strong>, Actility<\/strong>, Helium<\/strong> or a private network.<\/p>\n

                Can the S31B withstand outdoor conditions?<\/h3>\n

                Yes, the enclosure is IP66 anti-condensation<\/strong> and the operating range is from -40 \u00b0C to +85 \u00b0C. It is designed to stay outdoors all year round, including in humid environments.<\/p>\n

                Can an alarm be configured?<\/h3>\n

                Yes. The S31B features Temperature and humidity alarms<\/strong> function that triggers an immediate transmission when the value exceeds a configurable high or low threshold, in addition to the periodic transmissions.<\/p>","protected":false},"excerpt":{"rendered":"

                  \n
                • Built-in Sensirion SHT31 sensor<\/strong> : T\u00b0 -40\/+80 \u00b0C \u00b10.2 \u00b0C and RH 0-99.9 % \u00b12 %<\/li>\n
                • BLE configuration + OTA updates<\/strong> : LoRaWAN 862-1020 MHz, +22 dBm, RX -139 dBm<\/li>\n
                • IP66 anti-condensation housing<\/strong> : 8,500 mAh battery (LB), 19,000 mAh (LB2) or solar (LS)<\/li>\n<\/ul>","protected":false},"featured_media":31447,"template":"","meta":[],"product_brand":[442],"product_cat":[441],"product_tag":[],"class_list":["post-31445","product","type-product","status-publish","has-post-thumbnail","product_brand-dragino","product_cat-capteurs-detecteurs-maison-connectee-domotique-iot","first","instock","taxable","shipping-taxable","purchasable","product-type-variable","add-to-wishlist-after_add_to_cart"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product\/31445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product\/31445\/revisions"}],"predecessor-version":[{"id":33723,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product\/31445\/revisions\/33723"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/media\/31447"}],"wp:attachment":[{"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/media?parent=31445"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product_brand?post=31445"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product_cat?post=31445"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/monraspberry.com\/en\/wp-json\/wp\/v2\/product_tag?post=31445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}