The railway digital track gauge is mainly used for the measurement of railway track gauge, superelevation, inspection interval, and back protection distance. It can be used for public works maintenance, overhaul, engineering survey and other relevant departments' line operations. The instrument has fast measurement speed and is easy to use. It can be used both day and night. It is an ideal measurement tool for public works and engineering departments. GJC-JGX-L type railway digital display gauge gauge can be divided into grades: 0 grade, 1 grade, 2 grade.The corresponding models are GJC-JG0-L, GJC-JG1-L and GJC-JG2-L.