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Specifications
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Common Features
- Ultrasonic non-contact liquid level measurement
- Measurement range: 20 mm to 2000 mm
- Measurement accuracy: ±(5 mm + S × 0.5%) where S is the measured distance
- Suitable for liquid level monitoring in tanks, containers, and vessels
- Ultrasonic sensing allows measurement without opening or modifying the container
- Ultra-low power consumption design
- Support periodic uplink and event-based reporting
- Support Bluetooth (BLE) for local configuration
- Support wireless OTA firmware updates
- IP66 waterproof enclosure for outdoor installations
- Battery powered operation using high-capacity lithium battery
- Optional solar-powered version available
Network Specific Features and Specifications
- LoRaWAN (DDS20-LB / DDS20-LS)
- LoRaWAN 1.0.3 Class A compliant
- Supported frequency bands: EU868, US915, AU915, AS923, EU433, CN470, KR920, IN865
- LoRa frequency range: 862–1020 MHz
- Receiver sensitivity: down to -139 dBm
- RF output power: up to +22 dBm
- Sleep mode current: ~5 µA at 3.3 V
- Battery version (LB): 8500 mAh Li/SOCl2 non-rechargeable battery
- Solar version (LS): integrated solar panel with rechargeable battery
- NB-IoT (DDS20-NB / DDS20-NS)
- NB-IoT (CAT-NB2) cellular connectivity
- Nano SIM card slot
- Uplink protocols: MQTT, MQTTs, TCP, UDP, CoAP
- Supported NB-IoT bands: B1, B2, B3, B4, B5, B8, B12, B13, B17, B18, B19, B20, B25, B28, B66, B70, B85
- Battery powered using 8500 mAh Li/SOCl2 battery
- LTE-M & NB-IoT Dual Mode (DDS20-CB / DDS20-CS)
- Dual-mode LTE-M (CAT-M1) and NB-IoT cellular connectivity
- Nano SIM card slot
- Uplink protocols: MQTT, MQTTs, TCP, UDP, CoAP
- LTE-M bands: B1, B2, B3, B4, B5, B8, B12, B13, B18, B19, B20, B25, B26, B28, B66, B85
- NB-IoT bands: B1, B2, B3, B4, B5, B8, B12, B13, B17, B18, B19, B20, B25, B28, B66, B71, B85
- Battery powered using 8500 mAh Li/SOCl2 battery
Common Specifications
- Measurement principle: Ultrasonic distance measurement
- Valid detection distance: 20 mm to 2000 mm
- Operating temperature: -40 C to +85 C
- Storage temperature: -40 C to +85 C
- Operating humidity: 0 to 100% RH (non-condensing)
- Supply voltage: 2.5 V to 3.6 V
- Enclosure protection rating: IP66
Applications
- Water tank level monitoring
- Chemical storage tank level monitoring
- Fuel tank level monitoring
- Wastewater and effluent monitoring
- Agriculture liquid storage monitoring
- Industrial liquid level monitoring
Package Includes
- DDS20 ultrasonic liquid level sensor x 1
- External antenna x 1
- Mounting accessories x 1 set
Dimensions and Weight
Battery Version
- Dimensions: approximately 145 × 80 × 50 mm
- Weight: approximately 190 g
Solar Version
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