Defect detector
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A defect detector is a wayside device used on railroads to detect problems in passing trains. The detectors are normally integrated into the tracks and often include sensors to detect several differen
Standard North American installation of a combination hot box / dragging equipment detector
Hot box detector
Hot box/wheel impact detectors at Shanghai Metro
Bogie performance detector - TBOGI system
Hot box (rail)
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A hot box is the term used when an axle bearing overheats on a piece of railway rolling stock. The term is derived from the journal-bearing trucks used before the mid-20th century. The axle bearings w
Defect detector
…integrated into the tracks and often include sensors to detect several different kinds of problems that could occur, including overheating axle bearings ("hot boxes") and dragging equipment. When rolling stock passes by a detector, an automated readout notifies the crew of any defects via radio. Defect detectors…
Hot axle box detector at Cogload Junction, England
A wheelset from a GWR wagon showing a plain, or journal, bearing end
A Swiss journal box