ALERT2 Products

About ALERT2 Products

High Sierra Electronics has a complete set of solutions using ALERT2 technology.  We have every component you need to upgrade your ALERT network or to build an ALERT2 solution from scratch.  We also have the expertise to design a new solution, or to help you through the process.

ALERT2 is the next generation technology for real-time radio hydrologic warning.  High Sierra Electronics is a founding member of the National Hydrologic Warning Councils’ ALERT2 Technical Working Group.

ALERT2 is a trademark of the National Hydrologic Warning Council

High Sierra Electronics ALERT2 Rain Gauge


ALERT2 Demodulator – Series 1002

The ALERT2 Demodulator – 1002 Series receives ALERT2 messages from remote sensing stations and passes them to a base station computer equipped with an ALERT2 base station software program.


  • Receives ALERT2 and Concentrated ALERT
  • SD Card Stores & Logs Data
  • Ethernet & Serial Data Ports
  • Optional ALERT Receive Capability

ALERT2 Repeater/Concentrator – 330X Series

The High Sierra Electronics, Inc. 330X Series of ALERT2 Repeaters/Concentrators supports ALERT2, the next generation of wireless communication protocol for use in real-time hydrologic monitoring systems.


  • Receives and Forwards ALERT2 Data
  • Programmable
  • Optional Sensor Inputs
  • Can be Equipped to Receive ALERT

ALERT2 Rain Gauge Data Transmitter Upgrade Kit Model 3324-02

The ALERT2 Rain Gauge Data Transmitter Upgrade Kit – Model 3324-02 is a cost effective way to upgrade a rain only monitoring site from Legacy ALERT to ALERT2.


  • Forward Error Correction
  • Data Transmitted as Engineering Units
  • TDMA Reporting Eliminates Collisions
  • Works Side-by-Side with Standard ALERT

ALERT2 Data Transmitters – Model 3306-02

The HSE ALERT2 Data Transmitter – Model 3306-02 is a powerful and flexible addition to HSE’s ALERT/IFLOWS family of products designed with the field technician in mind.


  • Data Transmitted as Engineering Units
  • Forward Error Correction
  • TDMA Reporting Eliminates Collisions
  • Works Side-by-Side with Standard ALERT

Hydromet Data Logger/Controllers – Model 3512-00

The Hydromet Data Logger/Controller – Model 3512-00 is a powerful and flexible addition to the 3306 family of transmitter products designed with the field technician in mind.


  • 8 Analog Inputs
  • 5 Digital Inputs including SDI-12
  • Graphical User Interface
  • 16 GB of Removable Memory
  • Can be Used as a Repeater

StormLink IQ ALERT2 Decoder – Series 8440

The “go anywhere” trouble-shooting, verification, and gauge network performance tools for flood warning managers and field maintenance operations.


Tools for Hydrologic Field Services and Maintenance Support Programs


For those operating hydrology networks, OneRain’s Field Decoder Solutions allow in-the-field analyses of gauge data messages for trouble-shooting, verification, and optimizing gauge network performance for ALERT/ALERT2 flood early warning systems and field instrumentation maintenance operations.

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Contrail TDMA Manager

Contrail® ALERT2™ TDMA Manager by OneRain provides a virtual environment in which you can design, manage, and maintain one or more networks in a controlled workspace.


  • Manage and design one or more networks in a controlled workspace
  • Aids in the proactive planning of your network capacity and demands
  • QA/QC verification optimizes transmission capacity

Contrail Base Station Software – Series 8400

Contrail-based solutions by OneRain deliver unique capabilities and a full suite of advanced tools used for operational decision support in application areas such as Flood Warning, Dam Safety, Reservoir Gate Operations, Road Weather, and more.


  • Real-time hydrometeorological data monitoring, forecasting and warning
  • 24/7 access from any mobile device to your mission critical data. Any time. Anywhere. When you need it.
  • Data Collection, Processing, Archiving and Dissemination


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