Products
Emergency Communications
- Emergency Communications
- Emergency Phones
- Towers and Wall-Mount Communication Stations
- View All Emergency Communications Categories
HUBBCOM™ IP Devices
- HUBBCOM™ IP Devices
- HUBBCOM™ IP Devices with Temperature Sensing
- HUBBCOM™ Media Server
- Multi-function IP Endpoint
- View All HUBBCOM™ IP Devices Categories
Mass Notification
- Mass Notification
- Accessories
- Addressable Amplified Speakers
- Head-End Equipment
- Towers & Modules
- View All Mass Notification Categories
Mining Communications
- Mining Communications
- Ground Sentinel® Systems
- Loudspeaking Telephone
- Mine Dial & Page Telephone
- View All Mining Communications Categories
Paging & Intercom
- Paging & Intercom
- ADVANCE
- ADVANCE Lite
- Ancillary
- Drivers
- EZ Page Intercom
- HUBBCOM™ IP Devices
- ICS
- IP On-board Train Comms
- Page/Party®
- RigCom
- SP2 - VoIP Multicast Paging & Intercom
- Signaling & Interfaces
- SmartSeries
- Spare Parts
- Speakers & Horns
- View All Paging & Intercom Categories
Public Address & General Alarm
- Public Address & General Alarm
- Elemec3
- IP Access Panel Lite
- IP Controller
- Inputs & Outputs
- View All Public Address & General Alarm Categories
Radio Communications
- Radio Communications
- Industrial Radio
- View All Radio Communications Categories
Radio Dispatch Products
- Radio Dispatch Products
- Accessories
- Adapters / Termination Panels
- Addressable Amplified Speaker
- Audio Accessory Box
- Consoles
- Desksets
- Telephone Interconnect
- View All Radio Dispatch Products Categories
Telephones

Solutions

Solutions By Market

Business Campuses Education Healthcare

Industrial Military & Government Mining

Oil & Gas Power Generation Public Safety & Security

Transit - Public Transport Transit – Mass Transit Communications Wastewater Treatment Facility

Solutions By Product Type

Auteldac 6 Blue Light Emergency Towers Clean Room Phones

Contactless Communications Emergency Phones Hubbcom™ IP Devices

Rugged Industrial Phones Touchless Communications

Solutions

Solutions
Solutions By Market
- Solutions By Market
- Business Campuses
- Education
- Healthcare
- Industrial
- Military & Government
- Mining
- Oil & Gas
- Power Generation
- Public Safety & Security
- Transit - Public Transport
- Transit – Mass Transit Communications
- Wastewater Treatment Facility
Solutions By Product Type
- Solutions By Product Type
- Auteldac 6
- Blue Light Emergency Towers
- Clean Room Phones
- Contactless Communications
- Emergency Phones
- Hubbcom™ IP Devices
- Rugged Industrial Phones
- Touchless Communications

Markets

Take a Tour

Business Campuses Education Healthcare

Industrial Military & Government Mining

Oil & Gas Power Generation Public Safety & Security

Transit - Public Transport Transit – Mass Transit Communications Wastewater Treatment Facility

Markets

Markets
Take a Tour

Resources

Useful Links

Manuals

Product Literature

Certificates & Approvals

ENGINEERING SPECIFICATIONS

TONE REFERENCE LIBRARY

Our Company

About Us

Blog

Events

Find a Sales Contact

Our Locations

Where to Buy

White Paper

Technical Service & Support

About Technical Service

Contact Technical Service

VOIP TELEPHONE SUPPORT

Return for Credit & Product Repairs (U.S.)

Returns for Repair (U.K.)

Returns for Credit or Replacement (U.K.)

Firmware

HUBBCOM™ Firmware

SP2 Firmware

Software

Audio Messenger Interface (AMI) ACT Software

GUDA - GAI-TRONICS Universal Device Application

Elemec3 - Network PA/GA System

MODBUS Software Download

SP2 - VoIP Multicast Paging & Intercom

Telephone Management Application Software Upgrade (TMA)

GAI-TRONICS' Apps

Elemec3 - IP Access Panel (IPAP) - Download Free App

Resources

Resources
Useful Links
- Useful Links
- Manuals
- Product Literature
- Certificates & Approvals
- ENGINEERING SPECIFICATIONS
- TONE REFERENCE LIBRARY
Our Company
- Our Company
- About Us
- Blog
- Contact Us
- Events
- Find a Sales Contact
- Our Locations
- Where to Buy
- White Paper
Technical Service & Support
- Technical Service & Support
- About Technical Service
- Contact Technical Service
- VOIP TELEPHONE SUPPORT
- Return for Credit & Product Repairs (U.S.)
- Returns for Repair (U.K.)
- Returns for Credit or Replacement (U.K.)
Firmware
- Firmware
- HUBBCOM™ Firmware
- SP2 Firmware
Software
GAI-TRONICS' Apps
- GAI-TRONICS' Apps
- Elemec3 - IP Access Panel (IPAP) - Download Free App

Email Address

Password

Forgot Password

Create an Account

My Lists

Our brands
Careers
Sustainability

Products

Emergency Communications

Emergency Phones
Towers and Wall-Mount Communication Stations

HUBBCOM™ IP Devices

HUBBCOM™ IP Devices with Temperature Sensing
HUBBCOM™ Media Server
Multi-function IP Endpoint

Mass Notification

Accessories
Addressable Amplified Speakers
Head-End Equipment
Towers & Modules

Mining Communications

Ground Sentinel® Systems
Loudspeaking Telephone
Mine Dial & Page Telephone

Paging & Intercom

ADVANCE
ADVANCE Lite
Ancillary
Drivers
EZ Page Intercom

View All

Public Address & General Alarm

Elemec3
IP Access Panel Lite
IP Controller
Inputs & Outputs

Radio Communications

Industrial Radio

Radio Dispatch Products

Accessories
Adapters / Termination Panels
Addressable Amplified Speaker
Audio Accessory Box
Consoles

View All

Telephones

Ancillary
Enclosures
HUBBCOM™ IP Devices
Hands-free Telephones
Mounting Kits / Mounting Posts & Accessories

View All

View All Data & Communications Categories

Products

Products
Emergency Communications
- Emergency Communications
- Emergency Phones
- Towers and Wall-Mount Communication Stations
- View All Emergency Communications Categories
HUBBCOM™ IP Devices
- HUBBCOM™ IP Devices
- HUBBCOM™ IP Devices with Temperature Sensing
- HUBBCOM™ Media Server
- Multi-function IP Endpoint
- View All HUBBCOM™ IP Devices Categories
Mass Notification
- Mass Notification
- Accessories
- Addressable Amplified Speakers
- Head-End Equipment
- Towers & Modules
- View All Mass Notification Categories
Mining Communications
- Mining Communications
- Ground Sentinel® Systems
- Loudspeaking Telephone
- Mine Dial & Page Telephone
- View All Mining Communications Categories
Paging & Intercom
- Paging & Intercom
- ADVANCE
- ADVANCE Lite
- Ancillary
- Drivers
- EZ Page Intercom
- HUBBCOM™ IP Devices
- ICS
- IP On-board Train Comms
- Page/Party®
- RigCom
- SP2 - VoIP Multicast Paging & Intercom
- Signaling & Interfaces
- SmartSeries
- Spare Parts
- Speakers & Horns
- View All Paging & Intercom Categories
Public Address & General Alarm
- Public Address & General Alarm
- Elemec3
- IP Access Panel Lite
- IP Controller
- Inputs & Outputs
- View All Public Address & General Alarm Categories
Radio Communications
- Radio Communications
- Industrial Radio
- View All Radio Communications Categories
Radio Dispatch Products
- Radio Dispatch Products
- Accessories
- Adapters / Termination Panels
- Addressable Amplified Speaker
- Audio Accessory Box
- Consoles
- Desksets
- Telephone Interconnect
- View All Radio Dispatch Products Categories
Telephones

Solutions

Solutions By Market

Business Campuses Education Healthcare

Industrial Military & Government Mining

Oil & Gas Power Generation Public Safety & Security

Transit - Public Transport Transit – Mass Transit Communications Wastewater Treatment Facility

Solutions By Product Type

Auteldac 6 Blue Light Emergency Towers Clean Room Phones

Contactless Communications Emergency Phones Hubbcom™ IP Devices

Rugged Industrial Phones Touchless Communications

Solutions

Solutions
Solutions By Market
- Solutions By Market
- Business Campuses
- Education
- Healthcare
- Industrial
- Military & Government
- Mining
- Oil & Gas
- Power Generation
- Public Safety & Security
- Transit - Public Transport
- Transit – Mass Transit Communications
- Wastewater Treatment Facility
Solutions By Product Type
- Solutions By Product Type
- Auteldac 6
- Blue Light Emergency Towers
- Clean Room Phones
- Contactless Communications
- Emergency Phones
- Hubbcom™ IP Devices
- Rugged Industrial Phones
- Touchless Communications

Markets

Take a Tour

Business Campuses Education Healthcare

Industrial Military & Government Mining

Oil & Gas Power Generation Public Safety & Security

Transit - Public Transport Transit – Mass Transit Communications Wastewater Treatment Facility

Markets

Markets
Take a Tour

Resources

Useful Links

Manuals

Product Literature

Certificates & Approvals

ENGINEERING SPECIFICATIONS

TONE REFERENCE LIBRARY

Our Company

About Us

Blog

Events

Find a Sales Contact

Our Locations

Where to Buy

White Paper

Technical Service & Support

About Technical Service

Contact Technical Service

VOIP TELEPHONE SUPPORT

Return for Credit & Product Repairs (U.S.)

Returns for Repair (U.K.)

Returns for Credit or Replacement (U.K.)

Firmware

HUBBCOM™ Firmware

SP2 Firmware

Software

Audio Messenger Interface (AMI) ACT Software

GUDA - GAI-TRONICS Universal Device Application

Elemec3 - Network PA/GA System

MODBUS Software Download

SP2 - VoIP Multicast Paging & Intercom

Telephone Management Application Software Upgrade (TMA)

GAI-TRONICS' Apps

Elemec3 - IP Access Panel (IPAP) - Download Free App

Resources

Resources
Useful Links
- Useful Links
- Manuals
- Product Literature
- Certificates & Approvals
- ENGINEERING SPECIFICATIONS
- TONE REFERENCE LIBRARY
Our Company
- Our Company
- About Us
- Blog
- Contact Us
- Events
- Find a Sales Contact
- Our Locations
- Where to Buy
- White Paper
Technical Service & Support
- Technical Service & Support
- About Technical Service
- Contact Technical Service
- VOIP TELEPHONE SUPPORT
- Return for Credit & Product Repairs (U.S.)
- Returns for Repair (U.K.)
- Returns for Credit or Replacement (U.K.)
Firmware
- Firmware
- HUBBCOM™ Firmware
- SP2 Firmware
Software
GAI-TRONICS' Apps
- GAI-TRONICS' Apps
- Elemec3 - IP Access Panel (IPAP) - Download Free App

Email Address

Password

Forgot Password

Create an Account

My Lists

Products
Data & Communications
Mining Communications
Ground Sentinel® Systems
Ground Check Monitor
GM8900/3125 Hz Ground Check Monitor

Item Added to Your Cart!

GM8900/3125 Hz Ground Check Monitor

By GAI-Tronics

Catalog ID: GM8900/3125

By GAI-Tronics

Catalog ID: GM8900/3125

The GAI-TRONICS Ground Sentinel® along with the associated filters is designed to monitor the integrity of the ground circuit of power distribution circuits in coal mines.