SDL V2

The SDL V2 Submersible Data Logger is a rugged, self-powered data logging and telemetry system for deploying environmental sensors in or near water without fear of accidental flooding.

  • FEATURES
  • QUICK SPECS
  • RESOURCES

Rugged

The SDL V2 is designed with impact-resistant PVC, two elastomer bumpers, shock-mounted electronics and redundant seals. It can withstand extreme wave action, floods and underwater deployment to 200 ft.
 

Underwater Connectors

All connections are made with a simple waterproof thread-in connector. This removes the complications and errors associated with connecting individual wires.
 

Extended Battery Life

The SDL V2 operates for months on sixteen D-cell alkaline batteries. For longer deployments, extra alkaline battery packs and solar charging options are available.
 

Device-to-Web

When communicating via wireless telemetry, measurement data streams directly to the WQData LIVE web datacenter.
 

Communication Options

Real-time telemetry options include cellular, satellite, and radio. All communication modules are securely housed within the submersible enclosure, and a waterproof antenna is integrated on the top of the device.
 

Measurement Versatility

The SDL V2 is configured with three sensor ports to interface with multi-parameter sondes, water quality sensors, temperature strings, Doppler velocity meters, water level sensors, and more. Supported sensor interfaces include SD-12 and RS-485.
 

Buoy Integration

The CB-50 data buoy is designed to accommodate the NexSens SDL V2 submersible data logging system for unattended deployment in lakes, rivers, and coastal waters.
Ports(3) UW8 ports for sensor connection; (1) UW6 port for host connection and external power
Host Interface(1) RS-485 (half duplex)
Sensor Interface(1) RS-485 (half duplex); (1) SDI-12; Optional RS-232 (via smart RS-232 to RS-485 adapter); Optional analog (via mV to RS-485 adapter)
Sensor Power(1) Switched 5 VDC, (1) Fulltime 12 VDC, (2) Switched 12 VDC
Sensor ProtocolsModbus RTU; NMEA 0183; SDI-12; GSI (via custom script)
Host ProtocolsModbus RTU; Terminal command interface
Log Interval1 minute to 24 hours; supports different intervals for different sensors concurrently
Real Time Clock (RTC)<30sec/month drift; Auto-sync weekly; Internal backup battery
Built-In SensorsTemperature (-40 to 85°C, 0.01°C resolution, ±2°C accuracy from -20 to 85C); Pressure (300 to 1100 mbar, 0.016 mbar resolution, ±4 mbar accuracy from -20 to 85C); Humidity (0-100%, 0.04% resolution, ±5% accuracy from 5 to 95% RH); Battery voltage; Current draw
Internal Memory256MB microSD card (expandable up to 32GB)
Internal Power(16) D-cell alkaline batteries
External Power Requirements5-24 VDC ±5% (Overcurrent and Reverse polarity protection)
Typical Current Draw (@12V)Low power sleep: 160uA; Active: 40mA; Cellular transmitting: 300 mA; Radio transmitting: 215mA; Iridium transmitting: 170mA
Maximum Depth200 ft.
Temperature Range-40 to +85°C
Dimensions5.5” (13.97 cm) diameter; 16.50” (46.36 cm) length (antenna length varies by model)
Weight11.0 lbs without batteries; 16.6 lbs with batteries
Remote CommunicationCellular; License-free 900MHz and 2.4GHz radio; Iridium satellite
Supported Cellular Modems2G/3G international; 3G North American; 4G LTE North American; LTE-M North America; (future LTE-M1 North America; NB-IoT Europe)
Certified Cellular CarriersAT&T, Verizon
Radio Range (Line of Sight)Low power: 2 miles; High power: 28 miles; Extended power: 60 miles
Radio TopologyPoint-to-Point; Star; Mesh