1.The upper and lower belt can be caught at the same time, with high reliability ;
2.The twisting force of coil spring acts as driving force, with quick reaction;
3.With simple operating principle, the device can make accurate signals and faulty action won\\\\\\\'t happen;
4.The friction block is of proper and stable structure, so it won\\\\\\\'t damage the belt;
5.The safe and stable whole frame won\\\\\\\'t damage the frame of belt conveyors.
6.Simple and stable structure and easy to maintenance;
7.With the device, maintenance time is short when belt breaks.