Rail Long String Measuring Device
The rail long string measuring device is mainly used for detecting the data of track height, track direction, track level, track distortion etc. It has the features of large measurement range, safe and reliable, easy to carry, durable, reasonable price and so on. The measurement distance is from 1 meter to 60 meters.
Working Principle
Cranking the device to drive ratchet and bring power to roller, thus the thread enters the roller through a rolling line device. It has the function of adjusting the tightness of roller etc. The high strength thread is equipped with the adjustable positioning magnetic blocks.