The wireless manhole cover sensor developed by Swift Wireless is installed at the bottom of the manhole cover, which can realize manhole cover opening monitoring, overflow monitoring, data uploading, abnormal state alarm and other functions. A single sensor can work independently and support networking communication with the company's gateway (choose the communication method according to customer needs). The transmission distance between networking and terminal information collector, wireless Internet of Things gateway and wireless signal repeater is 40~50m, with battery. Ultra-high protection level, suitable for all kinds of environment.