D20-NB - NB-IoT Waterproof /Outdoor Temperature Sensor


Monitor temperatures precisely with Dragino's D20-NB and D20S-NB NB-IoT Temperature Sensors, ideal for applications from food transport to environmental monitoring. Offering a wide measurement range and high accuracy, these sensors integrate seamlessly with Telemetry2U, providing instant alerts for temperature deviations, and the ability to visualise and analyse real-time and historical data. Their long-lasting battery life and extensive coverage ensure reliable, long-term performance for critical temperature monitoring needs.

New customers will enjoy 60-Day's FREE access on Telemetry2Us' IoT Platform. Read more here...

Manufacturer: Dragino
$125- +GST
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Accurate and Versatile Temperature Monitoring


The Dragino D20-NB and D20S-NB are specialized NB-IoT temperature sensors, capable of measuring temperatures from -55°C to 125°C with impressive accuracy. These devices are perfect for critical applications such as food transport, food vans, road, and soil temperature monitoring, where accurate temperature data is crucial.

Advanced Temperature Alarm Feature Users can set temperature alarms for immediate notifications, ensuring prompt action when temperatures deviate from set thresholds. The D20-NB model also includes a Datalog feature, enabling data saving during NB-IoT network downtime and automatic uploading once the network is restored.

Flexible Connectivity Options Supporting various uplink methods including MQTT, MQTTs, UDP, and TCP, the sensors can transmit data to a variety of IoT servers, catering to different application requirements. This versatility makes them suitable for a wide range of IoT-based temperature monitoring systems.

User-Friendly Configuration With BLE support for easy configuration and OTA updates, these sensors are designed for user convenience. Their approachable design makes setup and ongoing use straightforward, even for users with limited technical expertise.

Long-Term Reliability Powered by a robust 8500mAh Li-SOCI2 battery, the D20-NB and D20S-NB are built for long-term usage, ensuring several years of reliable temperature monitoring without the need for frequent battery replacements.

Enhanced with Telemetry2U Integration Integration with Telemetry2U's IoT platform brings additional benefits. Users receive instant email, SMS, or voice alerts if temperatures deviate from predefined norms. The ability to visualise real-time data and analyse historical trends through Telemetry2U's platform offers valuable insights, enhancing decision-making and operational efficiency.



Choose the 12-Month Subscription with Telstra SIM



When you select one of the "12-month IoT Platform Subscriptions", we'll handle all necessary configurations for seamless integration into Telemetry2U's IoT platform. If you also ordered a Telstra 500KB NB-IoT SIM card with your device, That'll also be installed and configured prior to shipment. The SIM card is locked to the device and the data capped at 500KB, so there is no chance of any suprise charges. 

IoT Platform Features

Check out a Live Demo of the Telemetry2U IoT Platform in Action

See how easy it is to add your own Dragino NB-IoT Devices to Telemetry2U

Attribute name Attribute value


  • NB-IoT Bands:B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
  • Ultra Low Power Consumption
  • 1 x DS18B20 Temperature probe
  • Measure range: -55°C ~ 125°C
  • Temperature alarm
  • IP66 Waterproof Enclosure
  • Support BLE remote configure and update firmware
  • Uplink on periodically
  • Downlink to change configure
  • 8500mAh Battery for long term use
  • Nano SIM card slot for NB-IoT SIM

Common DC Characteristics :

  • Supply Voltage: 2.5v ~ 3.6v
  • Operating Temperature: -40 ~ 85°C


Temperature Sensor :

  • Dallas DS18B20
  • Range: -55 to + 125°C
  • Accuracy ±0.5°C (max ±2.0 °C).


LoRa Spec : 

NB-IoT Module: BC660K-GL

Support Bands: 

  • B1 @H-FDD: 2100MHz
  • B2 @H-FDD: 1900MHz
  • B3 @H-FDD: 1800MHz
  • B4 @H-FDD: 2100MHz
  • B5 @H-FDD: 860MHz
  • B8 @H-FDD: 900MHz
  • B12 @H-FDD: 720MHz
  • B13 @H-FDD: 740MHz
  • B17 @H-FDD: 730MHz
  • B18 @H-FDD: 870MHz
  • B19 @H-FDD: 870MHz
  • B20 @H-FDD: 790MHz
  • B25 @H-FDD: 1900MHz
  • B28 @H-FDD: 750MHz
  • B66 @H-FDD: 2000MHz
  • B70 @H-FDD: 2000MHz
  • B85 @H-FDD: 700MHz


Battery :

  • Li/SOCI2 un-chargeable battery
  • Capacity: 8500mAh
  • Self-Discharge: <1% / Year @ 25°C
  • Max continuously current: 130mA
  • Max boost current: 2A, 1 second


Power Consumption: 

  • STOP Mode: 10uA @ 3.3v
  • Max transmit power: 350mA@3.3v
Package contents

Package Includes:

  • 1 x D20-NB  or  D20S-NB  NB-IoT Temperature Sensor
  • External antenna x 1


Dimension and weight:  

  • Device Size: 120 * 55 * 200 mm
  • Device Weight: 372g 

DataSheet, Document Base

User Manual -- Online Latest

Shared Folder for all Dragino Products