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DDS20-LB LoRaWAN® Ultrasonic liquid level sensor
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DDS20-LB LoRaWAN® Ultrasonic liquid level sensor

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The Dragino DDS20-LB / DDS20-LS LoRaWAN® Ultrasonic Liquid Level Sensor is a non-contact industrial liquid level monitoring solution designed for smart IoT deployments. It measures liquid height externally without opening or modifying the container, ensuring safe and maintenance-free operation.

Installed directly below the container, the DDS20-LB/LS uses ultrasonic sensing technology to measure liquid levels through the container base. This makes it ideal for hazardous, high-pressure, sealed, or chemically sensitive environments. It can measure toxic liquids, strong acids, strong alkalis, liquefied gases, and high-temperature liquids without direct contact.

The device transmits real-time liquid level data over LoRaWAN® networks to an IoT server, enabling long-range, low-power monitoring for industrial and smart infrastructure applications across India.

The DDS20-LB variant runs on an 8500mAh Li-SOCl₂ battery for up to 5 years of operation, while the DDS20-LS includes a solar panel with a 3000mAh Li-ion rechargeable battery for extended deployments.

AIoTkart® supplies genuine Dragino LoRaWAN® liquid level sensors with full IN865 compatibility for Indian LoRaWAN® networks.

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  • Non-contact ultrasonic liquid level measurement
  • No need to open or drill the container
  • LoRaWAN® 1.0.3 Class A compliant
  • IN865 and global band support
  • Valid level range: 20mm – 2000mm
  • High accuracy: ±(5mm + S×0.5%)
  • IP66 waterproof enclosure
  • Bluetooth v5.1 configuration
  • Remote configuration via LoRaWAN® downlink
  • Wireless OTA firmware updates
  • Ultra-low power consumption
  • Designed for up to 5 years operation

Measurement Specifications

  • Technology: Ultrasonic (non-contact)
  • Valid Level Range: 20mm – 2000mm
  • Accuracy: ±(5mm + S×0.5%)
  • Cable Length: 25cm

Common DC Characteristics

  • Supply Voltage: Built-in battery (2.5V ~ 3.6V)
  • Operating Temperature: -40°C to +85°C

LoRa Specifications

  • Frequency Range:
    • HF Band: 862 ~ 1020 MHz
    • LF Band: 410 ~ 528 MHz
  • Supported Bands: CN470 / EU433 / KR920 / US915 / EU868 / AS923 / AU915 / IN865
  • Max RF Output: +22 dBm
  • RX Sensitivity: Down to -139 dBm
  • High interference immunity

Battery (DDS20-LB)

  • Type: Li/SOCl₂ (Non-rechargeable)
  • Capacity: 8500mAh
  • Self-Discharge: <1% per year @ 25°C
  • Max Continuous Current: 130mA
  • Max Boost Current: 2A (1 second)

Solar Version (DDS20-LS)

  • Solar Panel
  • 3000mAh Li-ion rechargeable battery

Power Consumption

  • Sleep Mode: 5µA @ 3.3V
  • LoRa Transmit Mode:
    • 125mA @ 20dBm
    • 82mA @ 14dBm

Mechanical

  • Enclosure: IP66 waterproof
  • Device Size: 14.5 × 8 × 5 cm
  • Device Weight: 190 g

The DDS20-LB/LS is ideal for:

  • Smart liquid level monitoring
  • Industrial tank monitoring
  • Chemical storage monitoring
  • Liquefied gas tank monitoring
  • Water storage management
  • Hazardous liquid monitoring
  • High-pressure sealed container measurement
  • Smart city liquid control systems

No. It is a non-contact sensor installed externally under the container.

Yes. Since it does not contact the liquid, it is ideal for toxic or corrosive substances.

Yes, it supports IN865 along with other global LoRaWAN® bands.

Documents

DDS20-LB_User_Manual

Download

DDS20-LB_Datasheet 

Download

DDS20-LB_Firmware 

Download

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