The Trantech TTPFS30 Mechanical Paddle flow switch designed to detect the presence or absence of liquid flow in pipelines. Operating on a simple mechanical paddle principle, the switch is actuated by the movement of liquid against the paddle, providing a dependable SPDT microswitch output for pump protection, equipment interlocking, alarm indication, and process control. The adjustable paddle can be trimmed to suit a wide range of pipe sizes, making the TTPFS30 suitable for water, cooling systems, hydraulic circuits, lubrication systems, and general industrial process applications.