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Track Monitoring Systems

Track Monitoring

Track monitoring systems help maintain railroad safety by monitoring track alignment for lateral movement, longitudinal profile for settlement or heave, and cant for changes in the relative elevation of the two rails.

Automated Solutions

GEO-Instruments supplies two different wireless track monitoring solutions. Both provide continuous monitoring and automated processing, data visualization, and distribution of data and alerts. Datasheet

Advantages of Automation

Safety: Readings are obtained remotely, reducing access needed by technicians.
Reliability: Weatherproof sensors and smart networking provide data 24/7.
Quick Access: Data and alerts are available on smartphones and PCs just minutes after the reading is taken.

Wireless Tiltmeters

Tiltmeters provide 2D measurements for calculating changes in longitudinal profile and cant.

GeoCloud Wireless Tiltmeters are particularly robust, with reliable performance unaffected by water, snow, brake dust, cold temperatures, and electrically noisy environments.

The advanced flatmesh networking algorithms, powered by Senceive, ensure that measurements are never lost, even if neighboring sensors are damaged.

Wireless Tiltmeter for Track

Wireless tiltmeters are reliable, high resolution, self-powered sensors. They can be installed quickly and require no maintenance. Battery life is about 15 years.

Gateway for wireless tiltmeters

A cellular gateway collects the readings and transmits them to the internet. Gateways can be powered by a solar panel or AC mains. Costs for deploying this system are much lower than with cabled sensors.

Tiltmeters on railroad ties

The tiltmeters are fixed to the ties via brackets or glue. Each tiltmeter relays its readings to a neighboring tiltmeter. This allows transmission around curves and obstructions.


Readings are processed on a secure internet server. Graphs and data are made available to smart phone and desktop PCs web browsers only minutes later. Alerts are sent by email or text messages.

Tiltmeter array on track

An array of GeoCloud wireless tiltmeters ( circled )

AMTS Systems

AMTS provide 3D measurements for calculating changes in alignment, longitudinal profile, and cant.

AMTS can be optically networked over long distances without losing precision. In addition, they can provide absolute positioning in site coordinates.


Fifteen optically-networked AMTS were used to monitor a 2.5 mile span of track.


Solar-powered AMTS monitors track during adjacent construction.

AMTS work with prisms. Rail clip prisms are clamped to the track. Similar prisms can be anchored in the ballast. Both are relatively inexpensive and function without power or wiring.


Rail Clip Prism

Rail clip prisms on track

Rail clip prisms installed on both rails