Shanghai 21st Century Electronic Equipment Co., Ltd. is wholly owned subsidiary of Shanghai Tymex Tools Co., Ltd. It is a Hightech enterprise in Shanghai. It's also a qualified metrology unit audited by Shanghai technology & Quality Bureau. It was established in 1998. Our company has a high qualified R&D team. We have developed more than 40 models of metal detectors and electronic tools from analog to digital, from low to high end. To ensure the top quality, we have full set of rigorous ...