The Dragino DDS20-NB is an NB-IoT 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 IoT platform via the NB-IoT network.
The DDS20-NB 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-NB uses ultrasonic sensing technology for distance measurement. DDS20-NB is of high accuracy to measure various liquids such as toxic substances, strong acids, strong alkalis, and various pure liquids in high-temperature and high-pressure airtight containers.
DDS20-NB supports different uplink methods including MQTT, MQTTs, UDP & TCP for different application requirements, and supports uplinks to various IoT Servers.
DDS20-NB supports BLE configure and OTA update which make users easy to use.
DDS20-NB is powered by an 8500mAh Li-SOCI2 battery, it is designed for long-term use for up to several years.
DDS20-NB has an optional built-in SIM card and default IoT server connection version. Which makes it work with a simple configuration.
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
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)
Multiply Sampling and one uplink
Support Bluetooth v5.1 remote configure and update firmware
Uplink on periodically
Downlink to change configure
IP66 Waterproof Enclosure
8500mAh Battery for long-term use
Nano SIM card slot for NB-IoT SIM
Specifications:
Common DC Characteristics:
Supply Voltage: 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
Battery:
Li/SOCI2 un-chargeable battery
Capacity: 8500mAh
Self-Discharge: <1% / Year @ 25°C
Max continuous current: 130mA
Max boost current: 2A, 1 second
Power Consumption:
STOP Mode: 10uA @ 3.3v
Max transmit power: 350mA@3.3v
Applications:
Smart liquid control solution
Smart liquefied gas solution
Package Includes:
DDS20-NB NB-IoT Ultrasonic liquid level sensor x 1
External antenna 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
Part Number: DDS20-NB-XX
XX:
GE: General version ( Exclude SIM card)
1T: with 1NCE * 10 years 500MB SIM card and Pre-configure to ThingsEye server
Useful Link:
Datasheet
User Manual
Firmware
BC660 Wireless upgrade NB & NS firmware
