Digital Rolling Track Gauge For Track Geometry Measurement The portable rolling track gauge is designed for measuring the track gauge and super-elevation.The lightweight ,reliable and easy to use device offers unique measurement accuracy. The software system support for storing and analyzing the measuring data. It can be used for track inspection and rail maintenace. It is easy to carry, and night-time and tunnelwork, legible even in direct sunlight are supported which is an ideal measuring tool for track fine-tuning, track construction,inspection and track laying . Features 1. Large LED backlit display: especially suitable for day outside and dark night 2. Quick calibration operation: simple measurement process 3. Large capacity battery:long standby time 4. Accurate measurement:keep long-term stability 5. Temperature compensation :working temperature is -30~+55 6. Insulated design 7. Anti-electromagnetic interference 8. Waterproof:could use in rainy day 9. power saving function: no operation within 15 minutes, the system will automatically shut down.