The Lowrance ST-TBL Transom-mount paddlewheel speed/temp sensor with blue connector (non-networked).
Speed and Temperature Sensor For Lowrance Models:
-LCX: 110C, 111C HD,112C, 113C HD, 17M, 20C, 25C, 26C HD, 27C, 28C HD, 37C, 38C HD LMS: 330C, 332C, 334C iGPS, 335C DF, 337C DF, 339C DF iGPS, 480, 520C, 522C iGPS, 525C DF, 527C DF iGPS X100C, X102C, X105C DF, X107C DF, X125, X126DF, X135, X136DF, X-510C, X-515C DF, X52, X59DF
