DDS20-NB NB-IoT Ultrasonic liquid level sensor

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 sends 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 in 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 configuration and OTA update, which makes it 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 a 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 configuration and update firmware

Uplink on periodically

Downlink to change the configuration

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