SW3L-NB - NB-IoT Flow Sensor


Introducing the Dragino SW3L-NB, a versatile NB-IoT Flow Sensor designed to monitor water usage efficiently in homes, commercial, and industrial settings. This sensor provides real-time water flow volume data and alarms to prevent wastage, like in broken toilet scenarios. Seamlessly integrated with Telemetry2U, it offers live dashboard data, email, SMS, and voice alerts, along with historical data analysis. Its weatherproof design, long battery life, and simple configuration options make it an essential tool for smart water management.

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

Live Demo

Manufacturer: Dragino
$135- +GST
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Advanced Water Flow Monitoring


The Dragino SW3L-NB is a cutting-edge NB-IoT Flow Sensor, tailored for precise water usage monitoring. It's an ideal solution for managing water consumption in various settings, from residential to industrial.

Telemetry2U Integration for Comprehensive Data Management: With Telemetry2U, the SW3L-NB provides not just real-time water flow data but also enables efficient monitoring through dashboards. Users receive instant alerts via email, SMS, and voice calls, and can access historical data for detailed analysis.

Designed for Diverse Environments: The SW3L-NB is engineered for both indoor and outdoor use. Its weatherproof enclosure ensures durability, while the industrial-level battery performs reliably in varying temperature ranges.

Customisable Data Reporting: Updating every 20 minutes, the sensor effectively tracks water flow volume. It's also equipped with an alarm feature to promptly notify users of unusual flow patterns, helping to prevent water wastage.

Versatile Connectivity: Supporting multiple uplink methods like MQTT, MQTTs, UDP, and TCP, the SW3L-NB is adaptable to various IoT servers. This flexibility is crucial for diverse application requirements.

User-Friendly Operation: Designed with BLE configuration and OTA updates, the sensor ensures ease of use. This user-friendly aspect is vital for efficient device management.

Long-Lasting Battery for Continuous Operation: Powered by an 8500mAh Li-SOCI2 battery, the SW3L-NB is designed for long-term use, significantly reducing the need for frequent maintenance.



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
  • Features: 

    • 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
    • Upload water flow volume
    • Monitor water waste
    • Multiply Sampling and one uplink
    • Support Bluetooth v5.1 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 


  •  Flow Sensor application
  •  Water Control
  •  Toilet Flow Sensor
  •  Monitor Waste water

Common DC Characteristics:

  • Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~ 3.6v
  • Operating Temperature: -40 ~ 85°C


NB-IoT 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



  • 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:

  • SW3L-NB NB-IoT Flow sensor x 1
  • External antenna x 1


Dimension and weight:  

  • Package Size: 14.5 * 10 * 5 cm
  • Weight / pcs : 290 g