X2-CB Buoy-Mounted Data Logger

The X2-CB includes all the features of the flagship X2 data logger in a lid-mounted package designed for integration on CB-Series data buoys.


Smartphone Interface

A smartphone, tablet, or laptop connects by Wi-Fi to access sensor data and view or change settings. No application-specific hardware or software is required. Works within an existing Wi-Fi network or as a direct link from the X2-CB to the device.

Underwater Connectors

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


When communicating within a Wi-Fi network or connecting via remote telemetry, measurement data streams directly to the WQData LIVE web datacenter.

Wireless Communication

Wi-Fi provides short range and local connectivity. Remote options include radio, cellular, and satellite communications.

Measurement Versatility

SensorBUS technology incorporates industry standard SDI-12, RS-485 and RS232 interfaces in a single watertight cable. Smart sensors are available for most environmental measurements.

Buoy Mount Housing

The X2-CB is sealed in a watertight PVC enclosure mounted directly to the bottom of a NexSens CB-Series buoy's 316 stainless steel data well top plate. With (5) integrated sensor ports, a vent, an antenna port, and a communication/power port, the X2-CB provides ultimate flexibility and ease of access to all connections.

X2 Data Logger

MountCB-Series buoy data well plate
Material316 stainless steel plate with PVC body
Weight10.5 lbs.
Dimensions13.5" Diameter, 4.4" Height (6" with cell/radio antenna; 8.125" with Iridium antenna)
Power Requirements5-24 VDC +/-15% (Reverse polarity protected)
Current Draw (Typical @ 12VDC)Low power sleep: 200uA; Logger Active: 20mA; Wi-Fi Transmitting: 43mA; Cellular Transmitting: 200mA
Peak CurrentPower supply must be able to sustain a 500mA 1-second peak current (@ 12V)???
Operating Temperature-20 to 70°C
RatingIP67 (Standalone) IP65 (With telemetry)
Wi-Fi Communications802.11b/g/n (Direct to X2-CB or Connect X2-CB to an existing network)
Wi-Fi AntennaInternal to device
Wi-Fi Range250 ft. maximum1
User InterfaceRS-485 direct to PC software*, Wi-Fi-Enabled embedded web, WQData LIVE Web Datacenter, buzzer indicator
Data Logging64MB internal flash*, 256MB microSD card (expandable up to 32GB)
Data ProcessingParameter level polynomial equation adjustment; Basic & Burst Averaging (min, max, standard deviation, and raw data available)
Real Time Clock (RTC)<30sec/month drift2; Auto-sync weekly3; Internal backup battery
Log IntervalUser configurable from 1 second (10 minute default)4; Unique interval per sensor
Transmission TriggerTime-based, parameter threshold*; Selective parameter upload option
Sensor InterfacesSDI-12, RS-232 (3 Channels), RS485
Sensor Power(3) 12V regulated switch channels with 1.5A capacity5,6
Built-in SensorsTemperature (-40C to 85C, 0.002C resolution, ±2C accuracy); Pressure (300 mbar to 1100 mbar, 0.016 mbar resolution, ±2 mbar accuracy); Humidity (0% to 100%, 0.04% resolution, ±5% accuracy); Battery voltage
Sensor Ports(5) 8-Pin for Sensor Interface (RS-232, RS-485, SDI-12, 5V, 12V, GND)7
Power Port(1) 6-Pin for Power and Communication (12V Solar, Power Switch, RS-485 Host, GND)

Telemetry Options

CellularCDMA 800,1900MHz, GSM 850, 900, 1800, 1900 MHz, UMTS/HSPA 850, 900, 1700, 1900, 2100 MHz
Radio*900MHz Mesh Network (902-928MHZ Frequency)
Iridium*Short Burst Data (SBD) transceiver
Bridge*Radio to WiFi, Radio to Cellular, and Radio to Iridium
Antenna PortN-Style RF

Sensor Support

Tier 1Sensors automatically detected; No Setup
Tier 2Sensors automatically detected: Require limited setup
Tier 3*Custom user script creation available for interfacing to a wide array of sensors
Current Sensor ListAvailable Here
  Notes1Range varies based on many factors including obstructions, other wireless signals in the area, elevation change, and more. Actual distances may vary by location. 2Assumes 25°C operating temperature 3Requires the X2 to be connected to the internet 4Minimum log interval dependent on sensor limitations and processing time 5Cumulative concurrent current limit of all three channels is 2A 6Logger power supply must be able to support current requirements of sensors 7P0A & P0B share a single RS-232 and power channel. P1A & P1B share a single RS-232 and power channel. *Coming soon