The Dragino DDS20-LB is a LoRaWAN Ultrasonic liquid level sensor for Internet of Things solution. It uses none-contact method to measure the height of liquid in a container without opening the container, and send the value via LoRaWAN network to IoT Server.

The DDS20-LB sensor is installed directly below the container to detect the height of the liquid level. User doesn't need to open a hole on the container to be tested. The none-contact measurement makes the measurement safety, easier and possible for some strict situation.  

DDS20-LB uses ultrasonic sensing technology for distance measurement. DDS20-LB is of high accuracy to measure various liquid such as: toxic substances, strong acids, strong alkalis and various pure liquids in high-temperature and high-pressure airtight containers.

The LoRa wireless technology used in DDS20-LB allows device to send data and reach extremely long ranges at low data-rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption.

DDS20-LB supports BLE configure and wireless OTA update which make user easy to use.

DDS20-LB is powered by 8500mAh Li-SOCI2 battery, it is designed for long term use up to 5 years.

Each DDS20-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server and it will auto connect after power on.

Features: 

LoRaWAN 1.0.3 Class A

Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865

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

Support Bluetooth v5.1 and LoRaWAN remote configure

Support wireless OTA update firmware

AT Commands to change parameters

Downlink to change configure

IP66 Waterproof Enclosure

8500mAh Battery for long term use 

Specifications:

Common DC Characteristics:

Supply Voltage: built in 8500mAh Li-SOCI2 battery , 2.5v ~ 3.6v

Operating Temperature: -40 ~ 85°C

LoRa Spec:

Frequency Range,  Band 1 (HF): 862 ~ 1020 Mhz,Band 2 (LF): 410 ~ 528 Mhz

Max +22 dBm constant RF output vs.

RX sensitivity: down to -139 dBm.

Excellent blocking immunity

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:

Sleep Mode: 5uA @ 3.3v

LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm

Applications: 

Smart liquid control solution

Smart liquefied gas solution

Package Includes:

1 x LDDS20 LoRaWAN Liquid Level Sensor x 1

Note:

Ultrasonic coupling paste and Eproxy AB glue are subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.

Dimensions and Weight:

Device Size: 14.5 x 8 x 5 cm

Device Weight: 190 g

Order Info

DDS20-LB-XX:

XX: the default frequency band

EU433: Default frequency band EU433

CN470: Default frequency band CN470

EU868: Default frequency band EU868

IN865: Default frequency band IN865

KR920: Default frequency band KR920

AS923: Default frequency band AS923

AU915: Default frequency band AU915

US915: Default frequency band US915

Useful Link:

Datasheet

User Manual

LDDS20 v1.0 Power Analyze.pdf