6600-068 High Limit Sensor with connector. 7'5" length
Some of the models below could use the 6600-140 (sensor with connector installed 2'8" cable length), 6600-144 (same sensor, no connector, 2'8" cable length, use the 6600-144 in place of 6600-144) and 6600-068, 6600-129 ( length is 7'5" inches approx.) is the length of the cable.
If you are not sure then order the 6600-068, it is the longest cable so there would be no issues (length is 7'5" approx.)
Compatable with all models below

Hi-Limit Sensor fits these Sundance, Sweetwater, 680 and 780 Models:

• 04/2017+ 680 Prado/Prado 5
• 06/2014+ 680 McKinley/ Ramona
• 2013+ 680 Edison; 2013+ 780 Montclair
• 2012+ 680 Peyton E. 2011+ Select Series
• 2008+ 680 Denali/Tacoma; 2008-03/2017 780 Dover
• 2013-05/2014 680 Hartford and Hawthorne models without a circ pump
• 2007-03/2017 780 Hamilton, Chelsee, Certa
• 2007-03/2013 780 Camden
• 2007-2012 680 Hartford and Hawthorne models with or without a circ pump
• 2008-02/2012 680 Burlington model with or without a circ pump
• 2007 Metro, Solo, and 680 models
• 2006 Caprio, Metro, Solo and 680 Models
• 2006 Palermo, Bahia, and Cayman
• 2005 850E Models
• 2005 780, Sweetwater, and Del Sol Models (with curled finger connectors)
• 1998-2004 Portofino Models
• 1989-1991 701-724 Systems (with curled finger connectors)
• Replaced P/N 6600-129

Hi-Limit Sensor fits these Jacuzzi Models:

• 2007+ J-270, J-280, J-355, J-365 and J-375 Models
• 2005+ J-210, J-220 and J-230, J-200 LED Models
• 2005-2007 J-325 Models
• 2004+ J-335, J-345 Models
• 2003-2005 Del Sol Models
• 2002-2003 J-320, J-330, J-340 Models
• 2002+ J-300

Replaces 6600-129 (came without sensor harness, same sensor same length). Can replace the 6600-144, 6600-140 (cable length 2'8" will just have extra cable)