The Dragino DDS20-NB is a NB-IoT 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 IoT platform via NB-IoT network.

The DDS20-NB 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-NB uses ultrasonic sensing technology for distance measurement. DDS20-NB 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.

DDS20-NB supports different uplink methods including MQTT, MQTTs, UDP & TCP for different application requirement, and support uplinks to various IoT Servers.

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

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

DDS20-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with 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 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 Applications: Smart liquid control solution Smart liquefied gas solution

Specifications:

Common DC Characteristics:

Supply Voltage: 2.5v ~ 3.6v Operating Temperature: -40 ~ 85°C LoRa 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 continuously current: 130mA Max boost current: 2A, 1 second Power Consumption:

STOP Mode: 10uA @ 3.3v Max transmit power: 350mA@3.3v

Documents:

DataSheet, Document Base User Manual -- Online Latest Shared Folder for all Dragino Products

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 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

Part Number: DDS20-NB-

XX:

GE: General version ( Exclude SIM card) 1D: with 1NCE* 10 years 500MB SIM card and Pre-configure to DataCake server
1NCE SIM Card NB-IoT network coverage: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Finland, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Latvia, Malta, Netherlands, Norway, Puerto Rico, Russia, Slovak , Republic, Slovenia, Spain, Sweden, Switzerland, Taiwan, USA, US Virgin Islands

Shipping Notice

• We only support express shipping because of included battery
• Prices are exclusive of local taxes and import duties