A fingerprint sensing apparatus may include a fingerprint sensor system and a control system capable of receiving fingerprint sensor data from the fingerprint sensor system. With this configuration, the present invention provides a clip for firmly and easily mounting article on a support structure and for easily separating the article from the support structure. The microprocessor calculates a pressure differential between the inlet and outlet pressure and calculates an element condition status using at least one element condition parameter, which may include the pressure differential. Information stored in a database may also be updated based on the detected change. Somethings are only too good to be true only when we refuse to make them come true. A second embodiment comprised of male and female members is also disclosed.