The Dragino DDS20-LS is a LoRaWAN Ultrasonic liquid level sensor for the Internet of Things solution. It uses a non-contact method to measure the height of liquid in a container without opening it and send the value via the oRaWAN network to the IoT Server.
The DDS20-LS sensor is installed directly below the container to detect the height of the liquid level. The user doesn't need to open a hole in the container to be tested. The non-contact measurement makes the measurement safe, easier, and possible for some strict situations.
DDS20-LS uses ultrasonic sensing technology for distance measurement. DDS20-LS is of high accuracy in measuring various liquids 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-LS allows the 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-LS supports BLE configuration and wireless OTA update which makes users easy to use.
DDS20-LS is powered by a solar panel + Li-ion battery, it is designed for long-term use up to 5 years.
Each DDS20-LS is pre-loaded with a set of unique keys for LoRaWAN registrations, register these keys to the 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 the 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
Solar panel + 3000mAh Li-ion battery
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:
Solar panel + 3000mAh Li-ion battery
Capacity: 3000mAh
Self-Discharge: <1% / Year @ 25°C
Max continuous 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 ways. So the default package doesn’t include it and the user needs to purchase locally.
Dimensions and Weight:
Device Size: 14.5 x 8 x 5 cm
Device Weight: 190 g
Order Info
DDS20-LS-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
Firmware
Certificate
