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NexSens G2-RAIN Alert System

NexSens G2-RAIN Alert System


The NexSens G2-RAIN Alert System incorporates a precision rain gauge with cellular data communication and real-time notifications.


  • Rainfall notification on any smartphone or computer
  • Streamlined design with integrated mount and up to 4 year battery life
  • Siphon for accurate measurements at varying intensities
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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.

Integrated tipping bucket and MAST mount features create an easy to setup and simple to maintain monitoring system which can be installed and relocated in minutes. Devices can be configured directly from any web browser without the need for costly site visits and complicated connections.

The G2-RAIN’s included Tipping Bucket Rain Gauge with Siphon, uses a standard 8” (200mm) diameter receiver that adheres to WMO & NOAA criteria. The siphon allows a steady flow of water to the tipping mechanism in order to provide reliable readings in 0 to 27” (700mm) per hour rain conditions. The collector funnel comes with a stainless steel filter screen to reduce manual maintenance by preventing leaves and other debris from clogging the opening.

*To ensure reliable data transmission, confirm the availability of Verizon 4G service at deployment location.

Notable Specifications:

RTU Mount: 2” NPT pipe thread
Rain Gauge Mount: Mounting flange (Compatible with Rickly 3510, HyQuest TB3/4/6)
Material: Aluminum body with white powder coat finish
Weight: 6.5 lbs.
Dimensions: 5.4” Diameter, 4” Height
Temperature Range: -30 to 80 °C
Rating: IP65
Memory: Over 1.5M data records before rollover (Over 85 years with a 30 minute interval)
Battery: (2) D-Cell lithium (Thionyl Chloride)
Battery Life: 4 Years (average of 48 logs and 2 transmissions per day)
Tipping Bucket Input Connector: 2 pin screw terminal
Sensor Input Signal: Contact closure (100mS minimum)
Communication: NexSens hosted Verizon 4G cellular modem
Transmission Trigger: Interval rain rate, time-based
User Interface: NexSens WQData LIVE 2.0 web portal
Rain Interval: User configurable from 5 minutes to 24 hours (30 minute default)
User Parameters: Interval Rain, Rain Intensity, Total Rain (Calculated)
Meta Data Parameters: Tip Counter
Diagnostic Data Parameters: Input Power, Internal Pressure, Internal Temperature, Internal Humidity, Cell Signal Strength, Cell Module Power, Processor Power, Processor Current, RTC Power, Cell Module Current, Cell Status

Tipping Bucket Rain Gauge (Included with G2-RAIN)
Weight: 9 lbs.
Dimensions: 8” Diameter, 14.5” Height
Receiver: Machined aluminum 8" rim
Sensitivity: One tip per 0.01" rain
Measuring Range: 0 to 27 in/hr
Measuring Intensity Accuracy:
+/-2% @ 0 to 10 in/hr
+/-3% @ 10 to 20 in/hr
+/-5% @ 20 to 27 in/hr
Siphon: 0.016" (12ml) capacity brass & non-hydroscopic polymer with leaf/insect screen filter
Temperature: -20 to 70 °C

What's Included:

(1) G2 Series Battery Pack (installed)
(1) Rain Gauge (not included with G2-RAIN-RTU)
(1) SMA Antenna
(1) SMA Right Angle Adapter
(1) 9/64" Hex Wrench
(1) Quick Start Card

Image Part # Product Description Price Stock Order
NexSens G2-RAIN Alert System G2-RAIN Cellular rain alert system with tipping bucket (0.01” per tip)
Usually ships in 3-5 days
NexSens G2-RAIN Alert System G2-RAIN-RTU Cellular rain alert system without tipping bucket
Usually ships in 3-5 days
Image Part # Product Description Price Stock Order
NexSens Verizon Cellular Data Service VZ-25MB-M Verizon cellular data service with 25 MB monthly allowance & static IP address, priced per month
Usually ships in 3-5 days
NexSens Verizon Cellular Data Service VZ-25MB-Y Verizon cellular data service with 25 MB monthly allowance & static IP address, priced per year
Usually ships in 3-5 days
NexSens G2-RAIN Battery Pack G2-BAT-2D G2-RAIN battery pack, 2 D-Cell
Usually ships in 3-5 days
NexSens MAST Aluminum Mounting Pole MAST 2" NPT threaded aluminum pipe assembly for hardware mounting, 24" length
Usually ships in 3-5 days

Questions & Answers

| Ask a Question
Can this product be used in a Flood Alert System?
Yes, this product's real-time updates and configurable alarms make it great for warning users of flood situations.
Can I provide my own cellular data service?
No, in order to simplify the setup process, the Verizon cellular account must be setup by NexSens.
Is a paid subscription to WQData LIVE required to use this product?
No, the required WQData LIVE subscription cost is bundled into the Verizon cellular data price, so a separate subscription is not required.
Does the product come with a rain gauge or do I need to supply my own?
The G2-RAIN comes bundled with a syphoning tipping bucket rain gauge, but the G2-RAIN-RTU does not in order to allow you to use your own gauge if desired.
Are the batteries user replaceable?
Yes, the user can purchase replacement battery packs and install themselves.
Do I need to purchase an additional cellular antenna?
No, it comes with an SMA whip antenna that works fine in locations with good cellular coverage. If cell signal is weak in the deployment area, the included right angle adapter can be installed to increase signal strength.
Why is the rain interval limited to a minimum of 5 minutes?
Various research has shown that using a period shorter than 5 minutes with a tipping bucket rain gauge is inaccurate due to the stepped nature of the gauge's output. Since the bucket can be partially full at the end of a period without the G2-RAIN knowing, it is necessary to increase the rain interval to at least 5 minutes for reliable measurement values.
Does the G2-RAIN's included tipping bucket rain gauge adhere to WMO & NOAA criteria?
Yes, the tipping bucket that is included with the G2-RAIN has an 8" opening and adheres to WMO & NOAA criteria.
Can this product be used in portable monitoring applications?
Yes, the simple design and modular nature of this product allow it to be used in permanent, semi-permanent, or portable monitoring applications.

In The News

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Rain data are some of the most basic measurements that environmental scientists collect. But ensuring quality data collection can be much less straightforward. This is because most rain alert systems out there simply don’t have the durability or features that pros need, despite high price tags. The NexSens G2-RAIN Alert System stands out as an exception. It is an all-in-one tipping bucket rain gauge and data logger built for easy setup, remote accessibility and simple data management. Let’s start with its construction that provides for easy deployment, but also durability over the long term. At its base, the G2-RAIN is typically attached to an aluminum mounting pole with 2-inch NPT threads.

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Tipping bucket rain gauges are often seen as simple devices and similar across the board. But picking the right gauge has serious implications on data quality and research success. There are many important factors that should be considered when selecting a tipping bucket rain gauge. These include: Region: What is the expected range of intensities the rain gauge will measure? Accuracy: What level of accuracy is acceptable? Return Frequency: Up to what return frequency do you wish to measure accurately? Reliability: What is the expected level of reliability over time? Hydrological Services has kept that in mind, making significant improvements to tipping bucket technology over the years. The company’s TB3, TB4 and TB6 rain gauges are the result.

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