‘PIE’ Brand Continuous Rail Thermometer Model CRT-1, generally confirming to RDSO specification but improved. The Thermometer records rail temperature for up to 9 months on an hourly basis.
Railway tracks are built in sections and assembled with a small gap between each rail segment. The jointed tracks enable adjustment by expansion/ contraction allowing for track temperature variations. Variations in temperature need to be monitored regularly to avoid track fractures and accidents. These days several types of rail thermometers are available for constant monitoring of tracks in remote areas, signalling if critical levels are reached, and recording of temperature trends. Manual measurement in many cases may not be possible and some models do not require staff deployments for temperature measurements. Accurate readings using rail thermometers are therefore of prime importance to guarantee security of railroad functioning.