Compare Quick view LSWD TR02400A16-48 Log in for pricing Rotron's Low Speed Warning Device (LSWD) is designed to be used in conjunction with our Fan Performance Sensor (FPS), which is standard on our E.C.D.C. air movers and optional on our AC air movers. The LSWD gives an early warning signal of potential... Log in for pricing Compare Quick view Qty in Cart: 0 Price: Log in for pricing Subtotal: