A rail scale also called "train scale" is widely used by lots of railway operators, mining companies and also rail vehicle safeguarding workshops. These scales are installed in the rail tracks and it will weigh a train when a train passes over, and the weighing results are stored locally or will be transferred to remote locations, and new methodologies are used for data sampling, analog to digital conversion, and also data transmission. With the help of advanced and well designed electronics, trains are permitted to travel up to 100kmh while being weighed, and information can be transferred to anywhere in the world, by phone connection, system internet etc.

There are mainly two types of train weighing systems they are Strain Gauge Systems and Loadcell Systems. Loadcell has been proved to be the most accurate and reliable for more than 3 decades. Many of the strain gauge systems are now being replaced by loadcell based systems, as in the earlier period users found this type of system to be unreliable and having steady temperature problems. There were also high installation and maintenance costs with lengthy installation and repair down time.