The rebar detector adopts a built-in large-capacity lithium battery with low power consumption. When the battery is fully charged, it will normally stand for about 16 hours. In the data management mode, the data storage, viewing, and deletion functions can store about 200,000 steel bar measuring point data; The steel bar detector adopts ultra-dense bar resolving ability to solve the problem of steel bar missing judgment; rebar detector can be equipped with a professionally designed standard calibration test block; the integrated design of the host and the sensor coil is compact, lightweight, and easy to carry; Real-time judgment of the middle position of the adjacent steel bar, indicator light prompt, can avoid the surrounding steel bars, convenient for drilling cores; the steel bar detector is shockproof, has a protective lining inside, and is equipped with a waterproof cover, which is easy to carry; equipped with Zhongdi Yuanda steel bar detection Software to facilitate professional data analysis, data processing and complete report generation on PC.