1. Product introduction For field testing of water tightness of curtain walls or other similar building maintenance structures. 2. standard of execution GB/T 21086-2007《Curtain wall for building》 3. Product features In the early curtain wall engineering, there are no relevant technical standards, and no relevant testing and project acceptance management measures. Therefore, many early curtain wall projects have construction quality problems and safety risks, and these curtain walls can no longer be taken to the laboratory for testing. In view of this situation, our company has independently developed a set of devices for the site inspection of water tightness of curtain wall. The device is compact, practical, convenient to install and fast and accurate to measure.