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SGC-1 Digital Track Gauge is an electronic inspection instrument that employs microcomputer-based control for the accurate measurement of static track geometry parameters—including gauge and superelevation (cross level)—on railway tracks (including switches and crossings). Its accuracy class is available in Class 0, Class 1, and Class 2.

The SPM portable rail profile gauge is a rail cross-section profile measurement and analysis device developed by China Railway Materials Operation and Maintenance Technology Co., Ltd. It can accurately measure rail profiles and calculate key parameters such as rail side wear, vertical wear, superelevation, track gauge, equivalent conicity, and wheel-rail contact characteristics. When used with its dedicated tablet PC and proprietary software, it enables real-time profile analysis and data management.