The Dragino DDS20-LB is a LoRaWAN Ultrasonic liquid level sensor for the Internet of Things solution. It uses a none-contact method to measure the height of liquid in a container without opening the container and send the value via the LoRaWAN network to IoT Server.
The DDS20-LB 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-LB uses ultrasonic sensing technology for distance measurement. DDS20-LB is of high accuracy in measuring various liquid 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-LB 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 while minimizing current consumption.
DDS20-LB supports BLE configuration and wireless OTA update, which makes users easy to use.
An 8500mAh Li-SOCI2 battery powers DDS20-LB; it is designed for long-term use up to 5 years.
Each DDS20-LB is pre-load with a set of unique keys for LoRaWAN registrations, register these keys to local LoRaWAN server, and it will auto-connect after powering 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
- 8500mAh Battery for long-term use
Applications:
- Smart liquid control solution
- Smart liquefied gas solution
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:
- 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:
- Sleep Mode: 5uA @ 3.3v
- LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
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