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LoRaWAN Liquid Level Sensor

LoRaWAN Liquid Level Sensor


The LDDS20 is a LoRaWAN Ultrasonic Liquid Level Sensor usable for a wide range of Internet of Things applications. It uses an external-contact, non-penetrating method to measure the level of liquid in a container without opening the container, and uplinks the value via LoRaWAN to any IoT Server.

The LDDS20 sensor is installed on the outside of the vessel, directly on the bottom of the container, to measure the height of the liquid level. The sensor does not require any open hole into the container to be able to measure the level. The non-penetrating installation makes the measurement safer, easier, and enables use in many strict environments.

SKU: LDDS20 Categories: , ,

Product Description

The LDDS20 uses ultrasonic sensing technology for distance measurement. The LDDS20 is for high accuracy measurement of various liquids such as: toxic substances, strong acids, strong alkalis and various pure liquids in high-temperature and high-pressure airtight containers.

The LoRaWAN wireless technology used by the LDDS20 allows the sensor to send data over extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity while minimizing power consumption.

The LDDS20 is powered by a 8500mA Li-SOCI2 battery. It is designed for long term use up to 10 years*.

Each LDDS20 is pre-loaded with a set of unique keys for LoRaWAN registration. Register these keys to any LoRaWAN server and the sensor will auto connect after power on.

*Actual lifetime depends on network coverage, uplink interval, and other factors


  • LoRaWAN 1.0.3 Class A
  • Ultra low power consumption
  • Liquid Level Measurement by Ultrasonic technology
  • Measure through container, No need to contact Liquid.
  • Valid level range 20mm – 2000mm
  • Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
  • Cable Length : 25cm
  • Bands: EU433/CN470/EU868/IN865/KR920/AS923/AU915/US915
  • AT Commands to change parameters
  • Uplink on periodically
  • Downlink to change configure
  • IP66 Waterproof Enclosure
  • 8500mAh Battery for long term use


  • Smart liquid control solution
  • Smart liquefied gas solution

Suitable Container & Liquid

  • Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
  • Container shape is regular, and surface is smooth
  • Container Thickness:
    ✓ Pure metal material. 2~8mm, best is 3~5mm
    ✓ Pure non metal material: <10 mm
  • Pure liquid without irregular deposition

Additional Information

Weight .51 lbs
Dimensions 5.5 × 3 × 2.25 in

EU 433Mhz, CN 470Mhz, EU 868Mhz, IN 865Mhz, KR 920Mhz, AS 923Mhz, AU 915Mhz, US 915Mhz

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