L.B. Foster Salient Systems

RailStress Monitor™ 

The wireless RailStress Monitor is the first completely self-contained battery-powered measurement device for determining rail stress and temperature. This system provides the user with rail break alerts and real-time warnings of potential buckle conditions. It can also help establish proper rail neutral temperature at the time of maintenance or repair.


After 25 years of research, L.B. Foster has developed the next generation RailStress Monitor RSM™. When coupled with our new rich Internet application, IntelliTrack® Navigator, users can now manage large numbers of devices in the field.

This is a breakthrough technology that serves as a data analysis and prediction tool, as well as a real-time alarm monitoring system.


RailStress Monitor™

  • Size – 34 cm x 6 cm x 4.5 cm (13.5 in x 2.4 in x 1.75 in)
  • Weight – 1.6 kilograms (3.5 lbs.)
  • Battery life – up to 10 years
  • Peak power consumption – ¼ watt
  • Operating temperature – -40 to 70°C (-40 to 158°F)
  • Wireless

Communications Range

  • RSM™ handheld reader up to 50 meters (150 feet)
  • RSM™ wayside reader concentrator up to 300 meters (600 feet)
  • Wireless operating frequency – 2.400 to 2.4835 GHz
  • Sensor type – welded strain gage
  • Data storage capacity - six months of ten minute intervals

Download RSM™ Product Sheet

Download RSM™ Product Sheet (Portuguese)

Download RSM™ Product Sheet (Chinese)


  • Rail Break Detection
  • Potential Buckling Hazard Alerts
  • Reducing Hot Weather Slow Order Requirements
  • More Effective Rail Break/Defect Repair
  • SFT Readjustment Management
  • Monitoring of Longitudinal Forces in Rail Adjacent to Fixed Structures


  • Compact Design
  • Self-Contained (No External Wiring)
  • Simple Installation
  • Wireless Data Transmission
  • Monitors Rail Temperature and Stress
  • Reports to IntelliTrack Navigator Database
  • Up To 10-Year Battery Life
  • Available as a Service