NexSens G2-RAIN Alert System

User Guide



The NexSens G2-RAIN Alert System is a self-contained rain monitor with an integrated precision rain gauge and real-time data alerts. It transmits accurate rainfall measurements directly to WQData LIVE’s cloud based data management platform using internal power and an embedded cellular modem. Paired with WQData LIVE’s configurable alerts, users are notified of rain events directly on a mobile device or computer. Historical rain data can be viewed, graphed, and downloaded from WQData LIVE for additional analysis.




First-Time Setup
What’s Included1.1
Common Accessories
Body Tag2.1
Sensor Connections2.2
Apply Power3.1
Sensor Auto-Detection3.2
Quick Start Guides3.3
WQData LIVE4.1
About WQData Live Data Center4.2
Creating a WQData Live Account4.3
Creating a Project on WQData Live4.4
Adding a Data Logger to a Project4.5
Configure Telemetry5.1
Diagnostic Measurements
Diagnostic Measurements on WQData Live8.1
LED Indicator Lights8.2
Additional Resources 
How To8.4
Replacing a desiccant
First Time Setup

1.1 What’s Included

The G2-RAIN Alert System includes the following accessories and spare parts for start-up and maintenance.

  • (1) G2 Series Battery Pack (Installed)
  • (1) G2-RAIN-RTU
  • (1) Rain Gauge (not included with G2-RAIN-RTU)
  • (1) Quick Start Guide
  • (1) Wireless Antenna
  • (1) Antenna Right Angle Adapter
  • (1) 9/64″ Hex Wrench

1.2 Common Accessories

The following are common accessories to the G2-RAIN Alert System power and mounting.



NexSens SP-Series Solar Power Packs

NexSens G2-RAIN Battery Pack

NexSens G2-RAIN External Power Adapter Cable

AC Power Adapter (UW6-PW)

NexSens UW6 Plug to Flying Lead Cable




2.1 Body Taga

Each X2 Environmental Data Logger has a unique body tag number that allows the user to match the data on WQData Live with the correct data logger/sensor system. Follow the link below to identify the body tag of your X2 Environmental Data Logger.

Body Tag Identification


2.1 Installing and Removing the Siphoning Bucket

The siphoning tipping bucket forces rainfall to flow directly onto the tipping apparatus, which allows for accurate precipitation measurements.


G2-RAIN siphoning tipping bucket



Follow the subsequent steps to remove the tipping bucket:

  1. Remove the siphoning tipping bucket from the G2-RAIN-RTU by using the 9/64” hex wrench to loosen the (3) bolts that are connecting the bucket and the RTU.
    1. Reference the G2-RAIN diagram below

G2-RAIN diagram


  1. Slide the bucket clockwise until the (3) bolts on the side of the G2-RAIN-RTU are aligned with the vertical portion of the L-shaped slots on the side of the bucket.

Removing the siphoning tipping bucket diagram


  1. Lift the bucket up gently.
    1. Note: During the bucket’s first removal, ensure to remove the rubber band from the tipping apparatus.

Remove the rubber band from the tipping apparatus


  1. Reinstall the bucket by aligning the vertical portion of the L-shaped slots with the (3) bolts on the side of the RTU. Rotate counter-clockwise and re-tighten the bolts.


3.1 Mounting the G2-RAIN System

Thread the base of the G2-RAIN system onto a pre-installed galvanized steel or aluminum 2″ NPT pipe at the deployment location.

  • Carefully rotate the G2-RAIN system clockwise until the system is securely attached to the pipe.
    • The gauge should sit level to ensure that the acquired data provides the best representation of the rainfall.
      • A leveling fixture is located adjacent to the tipping mechanism beneath the siphoning bucket for reference.

Mounting the G2-RAIN


3.2 Telemetry Connection

The system includes an SMA antenna and an SMA right angle adapter for telemetry connection. Attach the SMA antenna to the copper threads found on the bottom of the G2-RTU.

  • If necessary, use the SMA right angle adapter to adjust the direction of the antenna for connection purposes.

Antenna connection

3.3 Apply Power

The Nexsens G2-RAIN Alert System comes with a pre-installed internal Lithium battery pack standard. An external power cable accessory is available which facilitates the use of an AC power adapter or SP-Series solar power pack.

Use the internal Lithium battery pack as a power source by utilizing the Nexsens flathead screwdriver to twist the power plug found on the bottom of the G2-RTU to the “ON” position.

  • Twist the power plug until a single audible beep is heard. This confirms the power connection.

Internal power connection


Use external power by either connecting the G2-RTU adapter cable to an SP-Series solar panel or an AC power adapter.

  • Listen for the beep to confirm power connection.

UW6-PW AC power adapter


SP-Series solar panel



4.1 WQData Live

4.2 About WQData LIVE Data Center

WQData LIVE interface


WQData LIVE is a Cloud Data Center used in conjunction with the X2 data logger to:

  • Upload and store logged data
  • Generate and Export historical data reports
  • Monitor logger diagnostics
  • Remotely configure logger settingsa


4.3 Creating a WQData Live Account

A WQData Live account gives the user access to create projects, set up logger transmission and create a historical and real-time data record from the X2 Environmental Data Logger. Follow the link below to set up a WQData Live account.

Creating a WQData LIVE Account


4.4 Creating a Project on WQData Live

Creating a WQData Live project allows the user to provide a centralized location for data transmission from the X2 Environmental Data Logger. Follow the link below to create a WQData Live project.

Creating a Project on WQData Live


4.5 Adding a Data Logger to a Project on WQData Live

Adding a Data Logger to a Project on WQData Live 


Visit the WQData LIVE Web Datacenter page on the NexSens Knowledge Base to learn more about the capabilities of WQData LIVE.



5.1 Diagnostic Measurements on WQData Live

All G2-RAIN data loggers contain 11 meta diagnostic parameters that monitor the system’s health. Follow the link below to learn about the acceptable value ranges and troubleshooting options available for proper system maintenance.

G2-RAIN Logger Diagnostic Readings


5.2 Buzzer Pattern Indicator 

Follow the link below to view information regarding the Buzzer Patter Indicator displayed by the G2-RAIN.

What do the G2-RAIN buzzer pattern indicate? 



Additional Resources

5.3 Troubleshooting

Visit the X2-CB Troubleshooting Section of the NexSens Knowledge Base to learn effective troubleshooting strategies for the X2-CB.



5.4 How To

Visit the X2-CB How To Section of the NexSens Knowledge Base to learn advanced and user-friendly ways to utilize the capabilities of the X2-CB.

How To


5.5 FAQ

Visit the X2-CB FAQ Section of the NexSens Knowledge Base to find answers to common questions asked about the X2-CB from NexSens customers.





6.1 Replacing a Desiccant

Each X2-CB ships with a bag of desiccant for internal moisture control. Maintaining proper internal humidity is vital for the longevity of the system. Follow the link below to learn how and when a desiccant should be replaced.

Desiccant Replacement 


6.2 Battery Replacement

After prolonged exposure to cold weather conditions, internal batteries within a G2-RAIN may lack their usual power supply capability. Given enough time, the batteries age and environmental conditions could require a battery replacement to power the G2-RAIN adequately. Follow the link below to step by step instructions for replacing the internal batteries with a G2-RAIN system.

Replace a G2-RAIN Internal Battery Pack


6.3 Test/Replace a Reed Switch 

The Reed Switch is the component within the G2-RAIN that registers the tips accounting for precipitation. If a G2-RAIN is recording less than expected or zero rainfall, then the Reed Switch may need to be tested or replaced. Follow the link below to test, and if found inadequate, replace the Reed Switch within a G2-RAIN system.

Test/Replace a Reed Switch


6.4 Storage

Although year-round deployment is available with the X2-CB data logger, some systems are only utilized during field season when data is crucial. Before storing your system over the off-season follow the link below to learn best practices for X2-CB system storage.

Storage Requirements




6.5 Links

In the event that NexSens systems need returned for maintenance or repair, fill out our service request form.

NexSens Return Materials Authorization