X2 Environmental Data Logger
river monitoring system
river monitoring system
rail mount data logger
rail mount data logger
stream gauge
stream gauge

X2 Environmental Data Logger

The X2 data logger offers the latest in real-time monitoring technology with wireless communication, a large plug-and-play sensor library, and ultra-low power consumption.



watertight housing

Watertight Housing

The X2 is sealed in an aluminum housing with a polycarbonate top plate. Magnetically activated keys allow for input without jeopardizing the units waterproof seal. The unit is designed to work in extreme conditions, including underwater.

submersible connections

Underwater Connectors

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

cloud data


When connected via wireless telemetry, the WQData LIVE web datacenter offers a 2-way communication interface to the remote X2 data logger.

cellular, radio and satellite telemetry

Wireless Communication

Remote communication options include 4G LTE cellular, CAT-M1/NB2 cellular, and Iridium satellite.

water and weather sensors

Measurement Versatility

SensorBUS technology incorporates industry standard SDI-12, RS-485 and RS-232 interfaces in a single watertight cable. Smart sensors are available for most environmental measurements.

Easy Install

Easy Install

A specially designed mounting bracket holds the X2 to a 2" NPT pole for easy connection. The optional solar power pack also mounts to the pole and provides ample power for most applications.

smartphone connectivity

Smartphone Interface

Use a browser on a smartphone, tablet, etc. to access sensor data and view or change settings via WQData LIVE. No application-specific hardware or software is required.

Tech Specs

Mount: (3) 3/8-16 bolt holes on bottom
Material: Anodized aluminum
Weight: 3.5 lbs.
Dimensions: 4.9" Diameter, 4.77" Height
Power Requirements
: 5-16 VDC +/-5% (Reverse polarity protected)
Current Draw (Typical @ 12VDC): Low power sleep: 350uA; Active: 45mA; Cellular Transmitting: 300mA; Iridium satellite transmitting: 170mA
Peak Current: Power supply must be able to sustain a 500mA 1-second peak current (@ 12V)
Operating Temperature: -20C to 70°C
Rating: IP67 (Standalone); IP65 (With telemetry)
User Interface: RS-485 direct to CONNECT Software, WQDatalive Web Datacenter, Status LEDs
Data Logging: 256MB microSD card (expandable up to 4GB)
Data Processing: Parameter level polynomial equation adjustment; Basic & Burst Averaging (min, max, standard deviation, and raw data available)
Real Time Clock (RTC): <30sec/month drift1; Auto-sync weekly2; Internal backup battery
Log Interval: User configurable from 1 minute (10 minute default)3; Unique interval per sensor
Transmission Trigger: Time-based; Selective parameter upload option
Sensor Interfaces: SDI-12, RS-232 (3 Channels), RS485
Sensor Power: (3) independent switches from input supply4,5
Built-in Sensors: Temperature (-40 to 85C, 0.1C resolution, ±0.3C accuracy); Humidity (0% to 100%, 0.1% resolution, ±4% accuracy from 5 to 95% RH & -20 to 70C); Battery voltage; System & sensor current
Sensor Ports: (3) 8-Pin for Sensor Interface (RS-232, RS-485, SDI-12, Switched Power, GND)
Power Port: (1) 6-Pin for Power and Communication (Primary/Secondary/Backup Input, RS-485 Host, GND)
Telemetry Options: 4G LTE cellular, CAT-M1 cellular, Iridium satellite
Antenna Port: SMA

1Assumes 25ºC operating temperature
2Requires the X2 to be connected to the internet
3Minimum log interval dependent on sensor limitations and processing time
4Cumulative concurrent current limit of all three channels is 2A
5Logger power supply must be able to support current requirements of sensors 


What sensors are compatible with the X2 data logger?

The X2 data logger is directly compatible with sensors that have a native SDI-12, RS-485 or RS-232 output. The data logger can also support analog sensors using an analog-to-digital adapter (PN# mV-RS485) or tipping bucket rain gauges using a pulse-to-digital adapter (PN# RAIN-RS485). There are three tiers of sensor compatibility with the X2 data logger:

  • Tier 1 Sensors have auto-detect, which connects sensors automatically without programing -- no prior setup required.
  • Tier 2 Sensors must be configured with manufacturer-specific software before connecting to logger. Prior to data logger connection, customers can specify preferred types of parameter outputs.
  • Tier 3 Sensors can be added through the creation of a user-defined script. The script is written in Lua and utilizes NexSens-created functions to simplify programming. As long as the sensor communicates using SDI-12, RS-485, or RS-232 and can be powered from a 12V supply, it should be compatible with the X2 data logger.

See the complete list of supported sensors and associated tiers HERE.

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