The Dragino NDDS20 is a NB-IoT Ultrasonic liquid level sensor for Internet of Things solution. It uses non contact method to measure the height of liquid in a container without opening the container, and send the value via wireless to IoT Server via NB-IoT Network.
NDDS20
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 non contact measurement makes the measurement safety,
easier and possible for some strict situation.
NDDS20
uses ultrasonic sensing technology for distance measurement. NDDS20 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.
NarrowBand-Internet
of Things (NB-IoT) is a standards-based low power wide area (LPWA)
technology developed to enable a wide range of new IoT devices and
services. NB-IoT significantly improves the power consumption of user
devices, system capacity and spectrum efficiency,especially in deep
coverage.
NDDS20 supports different uplink methods include TCP, MQTT, UDP and CoAP for different application requirement.
NDDS20 is powered by 8500mAh Li-SOCI2 battery,
It is designed for long term use up to 5 years. (Actually Battery life
depends on the use environment, update period & uplink method)
To
use NDDS20, user needs to check if there is NB-IoT coverage in local
area and with the bands NDDS20 supports. If the local operate support
it, user needs to get a NB-IoT SIM card from local operator and install NDDS20 to get NB-IoT network connection.
